Darby, Ray. <br/><br/>
Conquering the deep sea frontier / 
by Ray and Patricia Darby. 
 - New York :  McKay,  1971. 
 - 204 p. :  ill. 
<br/><br/> Describes advances in underwater research and exploration made possible by recent technological developments. 
<br/><br/><label>LCCN: </label>74165082 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Oceanography--Research.<br/>Deep diving.
<br/><br/><label>Dewey Class. No.: </label>551.4