Plan and profile of Colorado River from Black Canyon, Arizona-Nevada to Arizona-Sonora boundary
Relief shown by contours and spot heights.; Each sheet includes "Key map of plan sheets."; "Printed in 1927."; "19 plans, 1 profile sheet."
on sheets 56 x 72 centimeters or smaller
Scale 1:31,680; Scale of profile sheet [1:126,720] 1 inch = 2 miles
General Map Collection
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