Sort By:
  1. Forest rangers' catechism : questions and answers on the national forests of the California region /
    By: Ayres, Robert W. - Hutchinson, Wallace I.
    Publication info: Washington, D.C. :U.S. Dept. of Agriculture,1931.
    Contributed by: U.S. Department of Agriculture, National Agricultural Library
    View Book
  2. History of timber management in the California national forests, 1850 to 1937.
    By: Ayres, Robert W. - United States.
    Publication info: [Washington]Forest Service, U.S. Dept. of Agriculture,1958.
    Contributed by: U.S. Department of Agriculture, National Agricultural Library
    View Book
  3. The national forests of California /
    By: Ayres, Robert W.
    Publication info: Washington, D.C. :U.S. G.P.O.,1927.
    Contributed by: U.S. Department of Agriculture, National Agricultural Library
    View Book