Sort By:
  1. Soil survey of the middle Gila Valley area, Arizona /
    By: Eckmann, E. C. - Baldwin, Mark. - Carpenter, E. J. - United States. Bureau of Soils. - United States. Dept. of Agriculture.
    Publication info: Washington :Govt. Print. Office,1920.
    Holding Institution: University of California Libraries (archive.org)
    View Book
  2. Soil survey of the Red Bluff area, California /
    By: Holmes, L. C. - Eckmann, E. C. - United States. Bureau of Soils.
    Publication info: Washington :Govt. Print. Office,1912.
    Holding Institution: University of California Libraries (archive.org)
    View Book