Hynek, Joseph Allen    1910- <br/><br/>
Observational information on artificial earth satellites /  
edited by J. A. Hynek and G. F. Schilling. 
 - Washington  :    National Academy of Sciences, National Research Cou ncil ,    1958. 
 - 38 p.  :    ill.  ;    28 cm. 
 - IGY satellite report series ;    no. 4. .
<br/><br/><label>Subjects--Topical Terms: </label><br/> Artificial satellites.<br/> Artificial satellites, Russian.<br/> Artificial satellites, American.