A number of people were involved in the preliminary processing of the various types of data and samples brought back from EASTROPAC cruises, but a smaller group carried through the advanced data preparation, computer programming, preparation of charts and copy, and the drafting which contributed directly to the production of this atlas. It is to this latter group that the editor and contributors first wish to extend their special thanks as follows:
          From the EASTROPAC operations staff at BCF, La Jolla: Kenneth A. Bliss, who worked with all the temperature and salinity data-checking, preparing for computer operations, editing preliminary charts, and programming; Michael G. Kruse, who prepared all the phytoplankton data-checking, preparing for computer operations, and contouring and editing preliminary charts; Tapuni S. Mulitauaopele, who worked with the oxygen data-checking, preparing for computer operations, and editing preliminary charts; and Robert N. Nishimoto, who worked with zooplankton and bird sighting data.
          From the Scripps Tuna Oceanography Research (STOR) group: Dorothy L. Burgess, who at various times worked with nutrient chemistry and oxygen data, digitized STD traces, and read off mixed layer depths; Edward H. Renger, who prepared the nutrient chemistry data-checking all cruises, preparing for computer operations, and editing preliminary charts from earlier cruises; and Don L. R Seibert, who performed similar functions with the nutrient chemistry data from later cruises.
          From the Oceanic Research Division, SIO: Miriam K. Oleinik, who worked with temperature and salinity data-checking, preparing for computer operations, editing, and programming ; and Ruth W. Opdycke, who also worked with tempera-ture and salinity data-checking, and hand-digitizing STD traces from some cruises.
          Forrest R. Miller, IATTC, wrote all of the computer programs for drawing and contouring vertical sections and horizontal plots as well as some of the programs used for processing various data. Without his excellent contouring programs and his generous assistance with all phases of computer operations, this atlas would have taken a much longer time to prepare. He was assisted by Thomas A. Knight, BCF, in the development of horizontal contouring programs. These programs have been described by Miller and Bliss (Miller, Forrest R., and Kenneth A. Bliss. 1970. Processing STD data and the construction of vertical temperature and salinity sections by computer. Bureau of Commercial Fisheries Fishery-Oceanography Center, La Jolla, California. Unpublished manuscript). James H. Jones, SIO, wrote the series of programs for processing STD data up to the stage of preparing the final STD data tape (Jones, 1969). Other computer programs used in data processing or preliminary chart preparation were written by Kenneth A. Bliss, BCF. Miriam K. Oleinik, SIO, wrote the isentropic analysis program as well as assisting with others. The program for calculating oxygen saturation is by Manley L. W. Young, SIO.
          Drafting was done by Roy M. Allen, Michael J. Griffith, Frank W. Lyall, Dale B. Mann, Stuart M. Peace, and Kenneth S. Raymond, all of BCF; J. Duane Anderson and Joann S. Anderson, under contract with BCF; Judith M. Shepard, IATTC; and Miriam K. Oleinik and Howard G. Shirley, SIO.
          The following groups were involved in preliminary data processing: The staff of the IATTC plankton sorting group who sorted the 1-m net oblique samples - Kathleen S. Anderson, Jo A. Bauerschmidt, Georgene Bauld, Diane L. Berry, Kimberlie Boyd, Barbara C. Burns, Eleanor W. Clark, Diane M. de Sonia, Katherine F. Dice, Betty C. Duchow, Lorraine M. Fischer, Rosemary Gonzales, Donna E. Kidd, Donna J. Koudelka, Dorothy D. Normark, Viola G. Olsen, Gina M. Pournelle, Idea M, Robbins, Susan L. Toy, Mary J. Tucker, Carol A. Tyre, and Nancy K. Wiley; those who sorted the micronekton samples Mary F. Farrell, K. Gopalakrishnan, Fay B. Hendricks, and Barbara Symroski of STOR and Svata M. Louda, BCF; the members of the Senior Scientist's Unit, BCF, who identified fish larvae - Elizabeth G. Stevens and Mary J. Kahn ; those who processed the Nansen cast data - the staff of the Data Collection and Processing Group, SIO, supervised by Frances C. Wilkes.
           Individuals who are due thanks include: Enid D. Duffield, BCF, for preparing tables for the introduction, composing and proofreading captions, and other indispensable clerical assistance; David Kramer, BCF, for editing and for many helpful suggestions concerning format; Nelson C. Ross, Jr., NODC, for his assistance in the early stages of processing the STD data; James R. Thrailkill, BCF, for contouring the fish larvae charts; John J. Dickenson, Timothy Geiser, Janet Rehm, and Stephanie M. Williams, STOR, for assistance with the nutrient chemistry data; David W. Asbury and Stephen T. Semegen, STOR, and Richard A. Macintosh, BCF, for assistance with phytoplankton data; Robert C. Counts, BCF, and John del Pescaio and Jay Tourney of the NSF summer student program for running plankton volumes; Walter Lenz, SIO, for preliminary work on mixed layer depths; Maureen A. Knight, BCF, for assistance with physical oceanographic data and computer operations; and Frank W. Lyall and George M. Mattson of BCF for the cover design.
          Acknowledgment is due to the participating agencies not located in La Jolla who performed the preliminary processing of their own cruise data and furnished the results to the EASTROPAC staff: Centre National de Dates Oceanograficos, Chile; Coast Guard Oceanographic Unit; Institute del Mar, Peru; Instituto National de Pesca, Ecuador, which worked in conjunction with IATTC; Pacific Support Group of the Naval Oceanographic Office; Stanford Oceanographic Expeditions of Stanford University; Department of Oceanography, Texas A & M University; and Inter-American Tropical Tuna Commission, which processed the data from Mexican cruises. The preliminary data on bird observations were worked up at the Smithsonian Institution.

Cuthbert M. Love, Editor