Surveys of Colorado River Basin, two thousand miles of stream courses mapped : 1924 Release 18030 / by U.S.G.S. 1924.

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Surveys of Colorado River Basin, two thousand miles of stream courses mapped : 1924 Release 18030 / by U.S.G.S. 1924.

A press release announcing the completion of maps of the Colorado River Basin.

[2] leaves ; 32 x 22 cm.

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