Investigating the universe  
/ papers presented to Zdeněk Kopal on the occasion of his retirement, September 1981  
 - Boston:   D. Reidel Publishing Company,   1981 
 - x, 458p. 
 - Astrophysics and space science library .
<br/><br/><label>ISBN: </label>90-277-1325-1 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astrodynamics 
<br/><br/><label>Subjects--Index Terms: </label>Astrodynamique 
<br/><br/><label>Universal Decimal Class. No.: </label>523.03(04)   / M1