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[[underlined]] U. S. A.: [[/underlined]] [[4 column table]] Harold J. Coolidge | Ph.D. | | Director of Pacific Science Board, National Academy of Science, U. S. A. Helmut K. Buechner | Ph.D. | | Assistant Direcotr for Ecology, Museum of Natural History, Smithsonian Institution, U.S. National Museum Joseph T. Callahan | | | Associate chief; Groung Water Branch, U.S. Geological Survey, Water Resources Division [[/4 column table]] -7-