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  1. By: Schopf, James Morton,
    Publication info: Urbana, The University of Illinois Press, 1943
    Holding Institution: University Library, University of Illinois Urbana Champaign
    Subjects: Botany  Embryology  Larch
  2. By: Hewitt, C. Gordon (Charles Gordon),
    Publication info: London?, s.n, 1908?
    Holding Institution: Canadiana.org
    Subjects: Control  Diseases and pests  Insect pests  Larch  Larch sawfly  
  3. By: Hewitt, C. Gordon (Charles Gordon), - Canada. Division of Entomology. - Dominion Experimental Farms and Stations (Canada)
    Publication info: Ottawa, Govt. Print. Bureau, 1912
    Holding Institution: Canadiana.org
    Subjects: Control  Diseases and pests  Insect pests  Larch  Larch sawfly