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
Bioastronomy The Search for Extraterrestrial Life — The Exploration Broadens
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
Applications of Computer Technology to Dynamical Astronomy Proceedings of the 109th Colloquium of the International Astronomical Union, Held in Gaithersburg, Maryland, 27-29 July 1988
Stargazers: The Contribution of Amateurs to Astronomy, Proceedings of Colloquium 98 of the IAU, June 20–24, 1987
Dynamical Trapping and Evolution in the Solar System Proceedings of the 74th Colloquium of the International Astronomical Union Held in Gerakini, Chalkidiki, Greece, 30 August – 2 September, 1982
Dynamics of Comets: Their Origin and Evolution Proceedings of the 83rd Colloquium of the International Astronomical Union, Held in Rome, Italy, 11–15 June 1984
The Search for Extraterrestrial Life: Recent Developments: Proceedings of the 112th Symposium of the International Astronomical Union Held at Boston ... Astronomical Union Symposia, 112)
Inside the Sun Proceedings of the 121st Colloquium of the International Astronomical Union, Held at Versailles, France, May 22–26, 1989
Multiple Periodic Variable Stars Proceedings of the International Astronomical Union Colloquium No. 29, Held at Budapest, Hungary 1–5 September 1975