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  1. By: Mackensen, Otto, - Roberts, W. C. - United States. Office of Experiment Stations.
    Publication info: [Washington, D.C.], [U.S. Dept. of Agriculture, Agricultural Research Administration, Bureau of Entomology and Plant Quarantine], [1948]
    Holding Institution: University of Florida, George A. Smathers Libraries
    BHL Collections: Expanding Access to Biodiversity Literature