00797cam a2200229 4500 116209212 TxAuBib 19991001120000.0 780329s1978||||||||||||||||||||||||eng|u 77093399 //r86 9780870442513 $5.75 0870442511 $5.75 DLC DLC TxAuBib The Ocean realm / prepared by the Special Publications Division, National Geographic Society, Washington, D.C. Washington : The Society, 1978. 199 p. : ill. ; 26 cm. Includes index. Bibliography: p. 196. Underwater exploration. Marine biology. National Geographic Society (U.S.), Special Publications Division.