Não informado. (1960). List of Bureau of Mines publications and articles with subject and author index. U.S. Department of the Interior, Bureau of Mines.
Chicago-referens (17:e uppl.)Não informado. List of Bureau of Mines Publications and Articles with Subject and Author Index. Washington: U.S. Department of the Interior, Bureau of Mines, 1960.
MLA-referens (8:e uppl.)Não informado. List of Bureau of Mines Publications and Articles with Subject and Author Index. U.S. Department of the Interior, Bureau of Mines, 1960.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.