Geology and chemical analyses of coal and coal-associated rock samples, Williams Fork Formation (Upper Cretaceous), northwestern Colorado
By: by Ricky T. Hildebrand ... [et al.].
Contributors: Hildebrand, Ricky T.; Geological Survey (U.S.)
Series: Open-file report -- 81-1348.; Open-file report (Geological Survey (U.S.)) -- 81-1348.
Publisher: U.S. Dept. of the Interior, Geological Survey
Published: 1981
Place of publication: [Reston, Va.?]
Language: eng
Format: Microform
Subjects: Coal -- Geology -- Colorado.
Notes: Microfiche. [Denver, Colo. : U.S. Geological Survey, 1981?]. 2 microfiches ; 11 x 15 cm.

Bibliography: p. 17-19.