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  1. By: Sprague, Roderick, - United States. Plant Disease Epidemics and Identification Section.
    Publication info: Beltsville, Md. :Plant Disease Epidemics and Identification Section, Agricultural Research Service, United States Department of Agriculture,1955.
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  2. By: Sprague, Roderick, - United States. Division of Mycology and Disease Survey.
    Publication info: [Washington, D.C.] :Division of Mycology and Disease Survey, Bureau of Plant Industry, United States Department of Agriculture,1942.
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  3. By: Sprague, Roderick, - United States. Plant Disease Survey.
    Publication info: Beltsville, Md. :Plant Disease Survey, Division of Mycology and Disease Survey, Bureau of Plant Industry, Soils, and Agricultural Engineering, Agricultural Research Administration, United States Department of Agriculture,1946.
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library