Sullivan, Walter. <br/><br/>
Assault on the unknown :  The International Geophysical Year / 
Walter Sullivan. 
 - [1st ed.]. 
 - New York :  McGraw-Hill,  [1961]. 
 - 460 p. :  ill. 
<br/><br/>Includes bibliography. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>International Geophysical Year, 1957-1958.