Planetary nebulae: observations and theory 
edited by Yervant Terzian                                        
 - Dordrecht  D. Reidel Publishing  1978 
 - xxi, 376p. 
<br/><br/><label>ISBN: </label>90-277-0872-X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy and Astrophysics Thesaurus<br/>Nebulae<br/>Planetary nebulae<br/>Ring nebulae
<br/><br/><label>Universal Decimal Class. No.: </label>082.2:52  / IAU-S76