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Published online by Cambridge University Press: 07 August 2017
Many new results have been obtained up to now in the problem of Wolf-Rayet (WR) stars. Most of these results are published now in the Proceedings of IAU Symposium N 143 (Van der Hucht and Hidayat, 1991), held in Baly in June 1990. Here we report some new additional results concerning mainly WR stars in binary systems.