Maps. Wyoming. Map showing construction materials and nonmetallic mineral resources of Wyoming [with text]; compiled by S. E. Clafoaugh, D. M. Larrabee, W. R. Griflitts, E. C. Fischer, Elinor L. Fox and M. K. Wilson. Scale 10 m.=1.3 in., scale 1:500,000. n. p.

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