Sullivan, Walter <br/><br/>
Assault on the unknown :  the international geophysical year / 
by Walter Sullivan 
 - New York :  McGraw-Hill,  1961 
 - 460 p. :  ill. ;  22 cm. 
<br/><br/>Includes bibliography 
<br/><br/><label>Subjects--Topical Terms: </label><br/>International Geophysical Year, 1957--1958