Mass Loss from Stars: Proceedings of the Second Trieste Colloquium on Astrophysics, 12–17 September, 1968

The Solar Spectrum: Proceedings of the Symposium held at the University of Utrecht 26–31 August 1963

Physics and Chemistry of Upper Atmosphere: Proceedings of a Symposium Organized by the Summer Advanced Study Institute, Held at the University of Orléans, France, July 31 — August 11, 1972

Variable Stars in Globular Clusters and in Related Systems: Proceedings of the IAU Colloquium No. 21 Held at the University of Toronto, Toronto, Canada August 29–31, 1972

Photon and Particle Interactions with Surfaces in Space: Proceedings of the 6th Eslab Symposium, Held at Noordwijk, the Netherlands, 26–29 September, 1972

Relativity, Astrophysics and Cosmology: Proceedings of the Summer School Held, 14–26 August, 1972 at the Banff Centre, Banff, Alberta

Recent Advances in Dynamical Astronomy: Proceedings of the NATO Advanced Study Institute in Dynamical Astronomy Held in Cortina D’Ampezzo, Italy, August 9–21, 1972