Planetary nebulae ; proceedings of the 180th Symposium of the International Astronomical Union, held in Groningen, August, 26 - 30, 1996 - Habing, Harm Jan; Lamers, Henny J. G. L. M.; Habing, H. J. (Proceedings of the ... symposium of the International Astronomical Union, 1997)
Published on behalf of the International Astronomical Union. - Includes index