International geophysical year the co-operation in Czechoslovakia 1957-1959 
Czechoslovak Academy of Sciences                             
 -  PrahabCeskoslovenske Akademie ved Praha  1960 
 - 270p 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy and Astrophysics Thesaurus<br/>Geophysics
<br/><br/><label>Universal Decimal Class. No.: </label>550.3  / CZE