Perry, Richard, <br/><br/>
The unknown ocean / 
Richard Perry ; illustrated by Nancy Lou Gahan. 
 - New York :  Taplinger,  1972. 
 - 288 p.  illus.  22 cm. 
 - His The many worlds of wildlife series, v. 1 .
<br/><br/>Bibliography: p. 268-274. 
<br/><br/><label>ISBN: </label>0800879384 
<br/><br/><label>LCCN: </label>77148828  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Marine animals<br/>Marine ecology
<br/><br/><label>LC Class. No.: </label>QL124  / .P47 1972 
<br/><br/><label>Dewey Class. No.: </label>591.92  / P464u