Dugan, James. <br/><br/>
World beneath the sea / 
by James Dugan [and others] Foreword by Gilbert M. Grosvenor. 
 - [S.l.] :  National Geographic Society,  1967. 
 - 204 p. :  ill., map. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Oceanography.
<br/><br/><label>Dewey Class. No.: </label>551.4