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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Schmid, J. M. - Mata, S.A. - Mitchell, J.C.
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  2. By: Bennett, D. D. - Schmid, J. M. - Mata, S.A. - Edminster, C.B.
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library