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  1. By: Heald, F. D. (Frederick De Forest), - Wolf, Frederick A. (Frederick Adolph), - United States. Bureau of Plant Industry. - United States. Department of Agriculture. - United States. Government Printing Office.
    Publication info: Washington, Govt. Print. Off, 1912
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  2. By: Heald, F. D. (Frederick De Forest), - Studhalter, Richard Arthur,
    Publication info: Harrisburg, Pa, W. S. Ray, state printer, 1914
    Holding Institution: Library of Congress
  3. By: Heald, F. D. (Frederick De Forest),
    Publication info: [Austin] The University of Texas [1909]
    Holding Institution: Library of Congress