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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Benson, Mary F. - United States. Bureau of Entomology and Plant Quarantine.
    Publication info: [Washington, D.C.], Bureau of Entomology and Plant Quarantine, U.S. Dept. of Agriculture, 1941
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Internet resource  Pieris rapae  
  2. By: Treherne, R. C. (Reginald Charles), - British Columbia. Horticultural Branch.
    Publication info: Victoria, B.C, W.H. Cullin, 1918
    Holding Institution: Canadiana.org
    Subjects: Agricultural pests  British Columbia  Cabbage  Diseases and pests  Pieris rapae  
  3. By: United States. Bureau of Entomology and Plant Quarantine.
    Edition: [Rev. Feb. 1951.].
    Publication info: [Washington, D.C, 1951]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Pieris rapae  Posters