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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Levin, J. H. (Jordan H.) - Gaston, H. P. (Harold Paul), - Michigan State University. Agricultural Engineering Department. - Michigan State University. Horticulture Department. - United States. Agricultural Research Service. Agricultural Engineering Research Division.
    Publication info: [Washington, D.C.], Agricultural Research Service, United States Department of Agriculture, 1958
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library