Wide Components in Double and Multiple Stars Proceedings of the 97th Colloquium of the International Astronomical Union held in Brussels, Belgium, 8–13 June, 1987
Activity in Cool Star Envelopes Proceedings of the Midnight Sun Conference, held in Tromsø, Norway, July 1–8,1987
Binary and Multiple Stars as Tracers of Stellar Evolution Proceedings of the 69th Colloquium of the International Astronomical Union, Held in Bamberg, F.R.G., August 31 – September 3, 1981
Inside the Sun Proceedings of the 121st Colloquium of the International Astronomical Union, Held at Versailles, France, May 22–26, 1989
Mass Loss from Stars Proceedings of the Second Trieste Colloquium on Astrophysics, 12–17 September, 1968
Calibration of Fundamental Stellar Quantities Proceedings of the 111th Symposium of the International Astronomical Union held at Villa Olmo, Como, Italy, May 24–29, 1984
Problems of Stellar Convection: Proceedings of the Colloquium No. 38 of the International Astronomical Union Held in Nice, August 16-20, 1976 (Lecture Notes in Physics)
Cool Stars, Stellar Systems and the Sun Proceedings of the Fourth Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun, Held in Santa Fe, New Mexico, October 16-18, 1985
Upper Main Sequence Stars with Anomalous Abundances Proceedings of the 90th Colloquium of the International Astronomical Union, held in Crimea, U.S.S.R., May 13–19, 1985
Mechanisms of Chromospheric and Coronal Heating Proceedings of the International Conference, Heidelberg, 5–8 June 1990