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  1. By: Benson, O. H. (Oscar Herman),
    Publication info: [Washington, D.C.?], [States Relations Service, Office of Extension Work, North and West?], [between 1914 and 1934?]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  2. By: Benson, O. H. (Oscar Herman), - Betts, George Herbert,
    Publication info: Indianapolis, The Bobbs-Merrill company, [1917]
    Holding Institution: Library of Congress
  3. By: Benson, O. H. (Oscar Herman), - Betts, George Herbert,
    Publication info: Indianapolis, The Bobbs-Merrill Co, c1915
    Holding Institution: University of California Libraries
  4. By: Benson, O. H. (Oscar Herman), - Betts, George Herbert,
    Publication info: Indianapolis, The Bobbs-Merrill Co, c1915
    Holding Institution: University of California Libraries
  5. By: Benson, O. H. (Oscar Herman), - Betts, George Herbert,
    Publication info: Indianapolis, Bobbs-Merrill, c1916
    Holding Institution: University of California Libraries
  6. By: Benson, O. H. (Oscar Herman), - Betts, George Herbert,
    Publication info: Indianapolis, The Bobbs-Merrill company, 1921
    Holding Institution: Library of Congress
  7. By: Benson, O. H. (Oscar Herman), - United States. Department of Agriculture. - United States. Office of Extension Work in the North and West,
    Publication info: [Washington?], [publisher not identified], [1917?]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  8. By: Benson, O. H. (Oscar Herman), - United States. Office of Extension Work in the North and West,
    Publication info: Washington, U.S. GPO, 1917
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  9. By: Benson, O. H. (Oscar Herman), - United States. Office of Extension Work in the North and West,
    Publication info: Washington, Government Printing Office, September 25, 1916
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  10. By: Benson, O. H. (Oscar Herman), - Farrell, George E. (George Edward),
    Publication info: Washington, Government Printing Office, 1917
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  11. By: Benson, O. H. (Oscar Herman), - Farrell, George E. (George Edward), - United States. Department of Agriculture. - United States. Office of Cooperative Extension Work. - United States. Office of Extension Work in the North and West.
    Publication info: Washington, BG.P.O, 1916
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  12. By: Benson, O. H. (Oscar Herman),
    Publication info: Washington, Government Printing Office, 1915
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  13. By: Benson, O. H. (Oscar Herman), - United States. Office of Extension Work in the North and West.
    Publication info: Washington, D.C, States Relations Service, Office of Extension Work, North and West, [1915]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  14. By: Benson, O. H. (Oscar Herman), - United States. Office of Extension Work in the North and West.
    Publication info: Washington, Government Printing Office, 1916
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  15. By: Benson, O. H. (Oscar Herman), - United States. Office of Experiment Stations.
    Publication info: Washington, U.S. GPO, 1915
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  16. By: Benson, O. H. (Oscar Herman), - United States. Office of Extension Work in the North and West,
    Publication info: Washington, Government Printing Office, 1917
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  17. By: Benson, O. H. (Oscar Herman), - United States. Department of Agriculture. - United States. Office of Extension Work in the North and West,
    Publication info: Washington, D.C, U.S. Department of Agriculture and State Colleges of Agriculture Cooperating, [1915]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  18. By: Benson, O. H. (Oscar Herman), - United States. Office of Extension Work in the North and West,
    Publication info: Washington, U.S. GPO, 1915
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  19. By: Benson, O. H. (Oscar Herman), - United States. Office of Extension Work in the North and West.
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, States Relations Service, Office of Extension Work, North and West, [1917]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library