Photographic photometry of variable stars in the globular cluster oméga Centauri, based on plates taken by H. van Gent with the Yale refractor at Johannesburg, measured by C.J. Kooreman and W. Chr. Martin and discussed
Photographic photometry of variable stars in the globular cluster oméga Centauri, based on plates taken by H. van Gent with the Yale refractor at Johannesburg, measured by C.J. Kooreman and W. Chr. Martin and discussed / by W.Chr. Martin