Note on the occurrence of tungsten minerals near Calabasas, Arizona, in Contributions to economic geology, 1909; Part I - Metals and nonmetals except fuels
Hill, J.M., 1910, Note on the occurrence of tungsten minerals near Calabasas, Arizona, in Contributions to economic geology, 1909; Part I - Metals and nonmetals except fuels: U.S. Geological Survey Bulletin 430, p. 164-166.
