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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Young, Paul A., ‏ - Morris, H. E. - United States. Office of Mycology and Disease Survey.
    Publication info: [Washington, D.C.], Office of Mycology and Disease Survey, Bureau of Plant Industry, United States Department of Agriculture, 1929
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library