Schassberger, H.T. (1972). K-Ar dates on intrusive rocks and alteration associated with molybdenum mineralization at Climax and Urad, Colorado, and Questa, New Mexico. Isochron/West Bulletin of Isotopic Geochronology, vol. 3, p. 29. Edited by: Keywords: Questa NM, Climax CO, Urad CO