Planetary nebulae  proceedings of the International Astronomical Union symposium No.34 held in Tatranska Lomnica, Czechoslovakia, 4-8 September 1967 
edited by D. E. Osterbrock and O'Dell C. R.                                               
 - Dordrecht  D. Reidel Publishing  1968 
 - xv, 469p. 
 - IAU Symposium; no. 34 .
<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-S34