Bradley,Wilmot H.
Origin and microfossils of the oil share
of the Green River formation of Colorado
and Utah.
4:o Washington 1931.
=Survey,United States geological survey.
Professional paper. 168. ^p "\ajhtryc^r
'^° J
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Bradley, Wilmot H.
Origin and microfossils of the oil share
of the Green River formation of Colorado
and Utah.
4:0 Washington 1931.
-Survey United States geological survey,
Professional paper. 168. FR Nacurvee 7
1530 L S2°4 j