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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Henricksen, H. C. (Henrick Christian), - Iorns, M. J. (Martin J.)
    Publication info: Porto Rico Agricultural Experiment Station, 1909
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    BHL Collections: Expanding Access to Biodiversity Literature
  2. By: Henricksen, H. C. (Henrick Christian), - Iorns, M. J. (Martin J.)
    Publication info: Mayagüez, P.R, Porto Rico Agricultural Experiment Station, 1909
    Holding Institution: University Library, University of Illinois Urbana Champaign