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.
Παραπομπή σε μορφή Chicago (17η εκδ.)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.
Παραπομπή σε μορφή MLA (8th εκδ.)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.
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