Soil survey of the middle Gila Valley area, Arizona /
Eckmann, E. C.
Carpenter, E. J. 1892-
United States. Bureau of Soils.
United States. Dept. of Agriculture.
Washington :Govt. Print. Office,1920.
"Advance sheets--Field operations of the Bureau of Soils, 1917."
At head of title: U.S. Department of Agriculture, Bureau of Soils.
Gila River Valley (N.M. and Ariz.)
S599.A7 E25 1920
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