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  1. By: Davis, R. L. (Robert Lesley),
    Publication info: Mayagüez, P.R, Puerto Rico Agricultural Experiment Station, 1934
    Holding Institution: University of Florida, George A. Smathers Libraries
    BHL Collections: Expanding Access to Biodiversity Literature
  2. By: Davis, R. L. (Robert Lesley),
    Publication info: Puerto Rico Agricultural Experiment Station, 1934
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library