Rotational velocities, v sin i, have been obtained for 96 Be and 68 normal B stars by measurements of the FWHM of the He I lambda-4471 line (for spectral types B0-B4.5) and Mg II lambda-4481 (for types B5-B9.5). The consistency of various published sources is examined.
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E. M. Halbedel (1996) studied this question.