The study of comets  pt. 2, proceedings of the International Astronomical Union Colloquium No.25, Co-sponsored by COSPAR and held at Goddard Space Flight Center, Green Belt, Maryland, October 28-November 1, 1974 
edited by B. Donn     
 - Washington  National Aeronautics and Space Administration  1976 
 - 537-1083p. 
 - NASA SP-393; no. 25 .
<br/><br/> Donated by Mrs. Bappu 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy and Astrophysics Thesaurus<br/>Comets
<br/><br/><label>Universal Decimal Class. No.: </label>523.64(082.2)  / DON