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  1. By: American Phytopathological Society. - 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,1956.
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  2. By: Joint Symposium on Insect-Transmitted Plant Diseases Cincinnati, Ohio) - American Association of Economic Entomologists. - American Phytopathological Society. - Entomological Society of America. - 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,1952.
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library