Campbell, I., and Schenk, E.T., 1950, Camptonite dikes near Boulder Dam, Arizona: American Mineralogist, v. 35, nos. 9-10, p. 671-692.
Campbell, I., and Schenk, E.T.
American Mineralogist, v. 35, nos. 9-10, p. 671-692.
Igneous Petrology, Granitoid, Mineralogy, Fanglomerate, camptonite dikes - Pliocene(?) or Miocene(?),