Index to geologic mapping in United States. 3. Geologic map index of Colorado; compiled by Leona Boardman and Annabel Brown. Scale 10 m.=0.9 in., scale 1:750,000. n. p.
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Geologic map index of Colorado; compiled by Leona Boardman and Annabel Brown. Scale 10 m.=0.9 in., scale 1:750,000. n. p.
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Index to geologic mapping in United States. 3. Geologic map index of Colorado; compiled by Leona Boardman and Annabel Brown. Scale 10 m.=0.9 in., scale 1:750,000. n. p.