Gaskell, Thomas Frohock. <br/><br/>
Under the deep oceans :  twentieth century voyages of discovery / 
Thomas Frohock Gaskell 
 - New York :   Eyre and Spottiswoode,  1960 
 - 239 p. :  ill. ;  22 cm. 
<br/><br/> Includes index 
<br/><br/><label>Subjects--Corporate Names: </label><br/>Challenger (Steamship)
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ocean bottom.<br/>Deep-sea sounding.
<br/><br/><label>Dewey Class. No.: </label>551.46  / GAU 1960