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BUTLER, G. M. and M. A. Allen

Petroleum

Illustrated with b/w drawings. Tucson: University of Arizona Bureau of Mines, 1921. 8vo. Wraps. 45 p. Bulletin No. 116, Oil Series No. 4. [108560]

Price: $25.00

BUTLER, G. M. and M. A. Allen

Tucson: University of Arizona/Arizona Bureau of Mines, 1921. 8vo. Wraps. 26 p. Bulletin No. 117. Mineral Technology Series No. 27. [40087]

Price: $25.00

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