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Russellites, New genus a problematical plant from the lower Permian of Texas / by Sergius H. Mamay.

by Mamay, Sergius H, 1920-2008.

Material type: book Book Publisher: Washington : United States Government Printing Office, 1968Availability: Items available for loan: Biblioteca Aranzadi [Call number: 561(764)"6134" MAM] (1).
Stratigraphy and paleontology of the revised type section for the Tahkandit Limestone (Permian) in East-Central Alaska / by Earl E. Brabb and Richard E. Grant.

by Brabb, Earl E, 1929- | Grant, Richard E, 1927-1994.

Material type: book Book Publisher: Washington : United States Government Printing Office, 1971Availability: Items available for loan: Biblioteca Aranzadi [Call number: 551.736(798) BRA] (1).
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