Reports on astronomy  vol.16A, pt. 1 
edited by G. Contopoulos                                         
 - Dordrecht  D. Reidel Publishing  1976 
 - vi, 228p. 
<br/><br/><label>ISBN: </label>90-277-0739-1 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy<br/>Astronomy and Astrophysics Thesaurus<br/>IAU Transactions
<br/><br/><label>Universal Decimal Class. No.: </label>063:52  / IAU-T16A