Não informado. (1999). Contributions to Geology. University of Wyoming, Department of Geology.
Chicago-referens (17:e uppl.)Não informado. Contributions to Geology. Laramie, Wyo: University of Wyoming, Department of Geology, 1999.
MLA-referens (8:e uppl.)Não informado. Contributions to Geology. University of Wyoming, Department of Geology, 1999.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.