Fitch, Walter S (szerk.): Multiple periodic variable stars 1. Proceedings of the International Astronomical Union Colloquium No. 29. Held at Budapest 1-5 September 1975 - Multiple periodic variable stars 1. (Budapest, 1976)
Fitch, Walter S (szerk.): Multiple periodic variable stars 1. Proceedings of the International Astronomical Union Colloquium No. 29. Held at Budapest 1-5 September 1975 - Multiple periodic variable stars 1. (Budapest, 1976)