Darby, Ray <br/><br/>
Conquering the deep sea frontier / 
by Ray Darby; Patricia Darby. 
 - New York :  McKay,  [1971]. 
 - xiv, 204 p. :  ill. ;  21 cm. 
<br/><br/> Describes advances in underwater research and exploration made possible by recent technological developments 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Underwater exploration<br/>Oceanography--Research