Earle, Sylvia A.,  1935- <br/><br/>
Exploring the deep frontier :  The adventure of man in the sea / 
By Sylvia A. Earle and Al Giddings ; Prepared by the Special Publications Division, National Geographic Society, Washington, D.C. 
 - [Washington, D.C.] :  The Society,  1980. 
 - 296 p. :  ill. ;  32 cm. 
 - 910/.09162 .
<br/><br/> Includes index. 
<br/><br/>Bibliography: p. 285. 
<br/><br/><label>ISBN: </label>0870443437 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Underwater exploration.<br/>Deep diving.
<br/><br/><label>Dewey Class. No.: </label>910/.09162