Petrovich, G V, Ed. <br/><br/>
Soviet encyclopedia of space flight 

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 - Mir Publishers, Moscow  1969 
 - 619 
 - .
<br/><br/>  
<br/><br/><label>ISBN: </label>  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy & allied sciences
<br/><br/><label>Dewey Class. No.: </label>R  520  PET-S