Earle, Sylvia A., <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,  c1980. 
 - 296 p. :  ill. ;  32 cm. 
<br/><br/> Includes index. 
<br/><br/>Bibliography: p. 285. 
<br/><br/> 55483 
<br/><br/><label>ISBN: </label>0870443437 :  $14.95 
<br/><br/><label>LCCN: </label>80007567  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Underwater exploration.<br/>Deep diving.
<br/><br/><label>LC Class. No.: </label>GC65  / .E185 
<br/><br/><label>Dewey Class. No.: </label>910.09162 Ear   15