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Published online by Cambridge University Press: 07 August 2017
The numbers, space distribution and energy distributions of Wolf-Rayet stars are reviewed. The numbers of known WR stars in the Galaxy, the LMC and the SMC are 189, 114, and 10, respectively. Distances and galactic distributions determined by various authors are compared and consequences for with evolutionary studies are discussed. Finally energy distributions from the optical to the radio regime are reviewed.