| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Multiple periodic variable stars: Proceedings of the International Astronomical Union colloquium no. 29, held at Budapest, Hungary, 1-5 September 1975: invited papers | 978-963-O5-1O62-2 (963-O5-1O62-6) | 1976 |
I.A. · International A · s. a. · W.A. · W.S. · Walter A. · Walter S.