Billings Geological Society. Field Conference. (1951). 2nd Annual Field Conference. The Society.
Citace podle Chicago (17th ed.)Billings Geological Society. Field Conference. 2nd Annual Field Conference. [Billings, Mont.: The Society, 1951.
Citace podle MLA (8th ed.)Billings Geological Society. Field Conference. 2nd Annual Field Conference. The Society, 1951.
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