Não informado. (1924). Contributions from the Museum of Geology of the University of Michigan. University of Michigan, Museum of Geology.
Citace podle Chicago (17th ed.)Não informado. Contributions from the Museum of Geology of the University of Michigan. Ann Arbor, Mich: University of Michigan, Museum of Geology, 1924.
Citace podle MLA (8th ed.)Não informado. Contributions from the Museum of Geology of the University of Michigan. University of Michigan, Museum of Geology, 1924.
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