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  1. By: Griffin, Edward Lawrence, - Back, E. A. (Ernest Adna),
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1924
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  2. By: Back, E. A. (Ernest Adna), - Cotton, R. T.
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1926
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  3. By: Back, E. A. (Ernest Adna),
    Publication info: Washington, U.S. Govt. Print. Off, 1938]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  4. By: Back, E. A. (Ernest Adna),
    Edition: Slightly rev. August 1939.
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, [1939]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  5. By: Back, E. A. (Ernest Adna),
    Publication info: Washington, D.C, U.S. Govt. Print. Off, 1937
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  6. By: Back, E. A. (Ernest Adna), - Cotton, R. T.
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1926
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  7. By: Back, E. A. (Ernest Adna),
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, [1937]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  8. By: Back, E. A. (Ernest Adna),
    Edition: Rev. June 1946
    Publication info: Washington, D.C, U.S. Govt. Print. Off, 1946
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  9. By: Back, E. A. (Ernest Adna),
    Edition: Slightly rev. April 1938.
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, [1938]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  10. By: Back, E. A. (Ernest Adna), - Cotton, R. T.
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1935
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  11. By: Back, E. A. (Ernest Adna), - Cotton, R. T.
    Edition: Rev.
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, [1937]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  12. By: Back, E. A. (Ernest Adna), - Cotton, R. T. - United States. Department of Agriculture.
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1942
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  13. By: Back, E. A. (Ernest Adna),
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1920
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  14. By: Back, E. A. (Ernest Adna),
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1914
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  15. By: Back, E. A. (Ernest Adna), - Pemberton, C. E. (Cyril Eugene),
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1918
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  16. By: Back, E. A. (Ernest Adna), - Pemberton, C. E. (Cyril Eugene),
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1918
    Holding Institution: Multiple institutions
  17. By: Back, E. A. (Ernest Adna), - Pemberton, C. E. (Cyril Eugene),
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1917
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  18. By: Morrill, A. W. (Austin Winfield), - Back, E. A. (Ernest Adna),
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, Bureau of Entomology, 1912
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  19. By: Back, E. A. (Ernest Adna), - Rabak, Frank.
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1922
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  20. By: Back, E. A. (Ernest Adna),
    Publication info: [Philadelphia, American Entomological Society], 1909
    Holding Institution: Smithsonian Libraries and Archives
  21. By: Morrill, A. W. (Austin Winfield), - Back, E. A. (Ernest Adna),
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, Bureau of Entomology, 1911
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  1. By: Back, E. A. (Ernest Adna),
    Type: Article
    In: Proceedings of the Entomological Society of Washington
    Volume: 42
    Date: 1940
    Page Range: 110--113
    Publication Info: Washington, etc, Entomological Society of Washington,
  2. By: Back, E. A. (Ernest Adna),
    Type: Article
    In: Entomological news, and proceedings of the Entomological Section of the Academy of Natural Sciences of Philadelphia
    Volume: 23
    Date: 1912
    Page Range: 73--77
    Publication Info: Philadelphia, [Entomological Rooms of the Academy of Natural Sciences],