Pettersson, Hans,    1888- <br/><br/>
The ocean floor /    
Hans Pettersson. 
 - New Haven :   Yale University Press,   1954. 
 - 181 p. :    ill. ;    21 cm. 
 - Yale university, Mrs. Hepsa Ely Silliman memorial lectures.   .
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ocean bottom--------
<br/><br/><label>Dewey Class. No.: </label>551.46