Motion, evolution of orbits, and origin of comets:   Symposium no. 45, held in Leningrad, U. S. S. R., August 4-11, 1970  
/ International Astronomical Union  
 - Dordrecht:   Symposium no. 45, held in Leningrad, U. S. S. R., August 4-11, 1970,   1972 
 - xxiii, 521p. 
<br/><br/><label>ISBN: </label>9027702071 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science
<br/><br/><label>Universal Decimal Class. No.: </label>521.7(082.2)   / L2