Ephemeris of satellite 1957 Alpha 2 and collected reports on satellite observations 

 - Washington, D. C.  National Academy of Science  1959 
 - 122p. 
 - International Geophysical Year Satellite Report Series; No. 9 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Satellite Report
<br/><br/><label>Universal Decimal Class. No.: </label>551.52:629.18  / NAS