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  1. By: Callaham, Robert Z.
    Publication info: Washington, D.C. :U.S. Dept. of Agriculture, Forest Service,1981.
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  2. By: Callaham, Robert Z. - Pacific Southwest Forest and Range Experiment Station (Berkeley, Calif.)
    Publication info: Berkeley, Calif. :U.S. Dept. of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station,[1960]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library