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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Hoagland, D. R. (Dennis Robert),
    Publication info: Berkeley, Calif, University of California, College of Agriculture, Agricultural Experiment Station, 1947
    Holding Institution: University of California, Davis Libraries
  2. By: Hoagland, D. R. (Dennis Robert), - California Agricultural Experiment Station.
    Publication info: Berkeley, College of Agriculture, University of California, 1949
    Holding Institution: University of California, Davis Libraries
  3. By: Hoagland, D. R. (Dennis Robert),
    Publication info: Waltham, Mass, Chronica botanica company, 1944
    Holding Institution: MBLWHOI Library