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  1. By: United States. Department of Agriculture. - United States. Agricultural Research Service. - United States. Entomology Research Branch.
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1956
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Chiggers (Mites)  Control  Insecticides  Parasites  
  2. By: Chittenden, F. H. (Frank Hurlbut), - United States. Bureau of Entomology. - United States. Department of Agriculture.
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, Bureau of Entomology, 1906
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Chiggers (Mites)  Insect pests
  3. By: Ewing, H. E. (Henry Ellsworth),
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1921
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Chiggers (Mites)