Multiple Periodic Variable Stars

The I. A. U. Colloquium No. 29 was held in Budapest, September 1-5, 1975. The subject of the colloquium was: "Multiple Periodic Variable Stars". The colloquium was organized by the Scientific Organizing Committee consisting of W. S. Fitch (Chairman), M. W. Feast, B. V. Kukarkin, P. Ledoux, J. Smak, R. S. Stobie, B. Szeidl, B. Warner and S. C. Wolff. The local organization was placed in the hands of a Committee consisting of the staff of the Konkoly Observatory: B. Szeidl (Chairman), K. Barlai, M. Ill, S. Kany6 and L. Szabados. The colloquium was attended by about 90 scientists representing Australia, Austria, Belgium, Bulgaria, Canada, Czechoslovakia, Denmark, France, F. R. G. , G. D. R. , Greece, Hungary, India, Ireland, Italy, Japan, The Netherlands, New Zealand, Poland, Roumania, South Africa, United Kingdom, U. S. A. and U. S. S. R. Eight sessions were held, viz. 1. . p Canis Majoris Stars. Chairman: W. Wenzel 2. Magnetic and Ap Variables. Chairman: S. C. Wolff 3. Miras and Red Variables. Chairman: P. R. Wood 4. Cepheids. Chairman: R. S. Stobie 5. RR Lyrae Stars. Chairman: B. Szeidl 6. RRs and {) Scuti Stars. Chairman: W. S. Fitch 7. White Dwarfs and Novae. Chairman: B. Warner 8. Close Binaries and X-Ray Sources. Chairman: E. H. Geyer At the beginning of the first session a welcome was presented by Professor G.