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  1. By: Fischer, George William, - Levine, M. N. (Moses Naphtali), - 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, 1941
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  2. By: Fischer, George William, - United States. Plant Disease Survey.
    Publication info: [Washington, D.C.], Plant Disease Survey, Division of Mycology and Disease Survey, Bureau of Plant Industry, Agricultural Research Administration, United States Department of Agriculture, 1942
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library