Planetary nebulae : Observations and theory : Symposium No. 76 held at Cornell University, Ithaca, New York, USA, June 6-10, 1977 - Planetary Nebulae Symposium (1977 : Cornell University, Ithaca); Terzian, Yervant, 1939-; International Astronomical Union (Dordrecht, Holland ; Boston : D. Reidel Publ. Co., 1978)
At head of title: International Astronomical Union. Union astronomique internationale.
Includes bibliogr. references
Keywords: Planetary nebulae -- Congresses