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  1. By: Roark, R. C. (Ruric Creegan) - Keenan, George Lawrence,
    Edition: Rev. May 1923.
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1923
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  2. By: Roark, R. C. (Ruric Creegan) - Keenan, George Lawrence,
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1919
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  3. By: Busbey, Ruth L. (Ruth Lawless), - McIndoo, N. E. (Norman Eugene), - Roark, R. C. (Ruric Creegan) - United States. Office of Experiment Stations.
    Publication info: [Washington, D.C.], [United States Department of Agriculture, Bureau of Entomology and Plant Quarantine], [1936]
    Holding Institution: University of Florida, George A. Smathers Libraries
    BHL Collections: Expanding Access to Biodiversity Literature
  4. By: Roark, R. C. (Ruric Creegan) - United States. Office of Experiment Stations.
    Publication info: [Washington, D.C.], [U.S. Dept. of Agriculture, Bureau of Entomology and Plant Quarantine, Agricultural Research Administration], [1951]
    Holding Institution: University of Florida, George A. Smathers Libraries
    BHL Collections: Expanding Access to Biodiversity Literature
  5. By: Roark, R. C. (Ruric Creegan) - United States. Office of Experiment Stations.
    Publication info: [Washington, D.C.], [U.S. Dept. of Agriculture, Bureau of Entomology and Plant Quarantine, Division of Insecticide Investigations], [1939]
    Holding Institution: University of Florida, George A. Smathers Libraries
    BHL Collections: Expanding Access to Biodiversity Literature
  6. By: McDonnell, C. C. - Keenan, George Lawrence, - Roark, R. C. (Ruric Creegan)
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1920
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  7. By: Roark, R. C. (Ruric Creegan)
    Publication info: [Washington, D.C.], [United States Department of Agriculture, Agricultural Research Administration, Bureau of Entomology and Plant Quarantine], [1945]
    Holding Institution: University of Florida, George A. Smathers Libraries
    BHL Collections: Expanding Access to Biodiversity Literature
  8. By: Roark, R. C. (Ruric Creegan) - United States. Office of Experiment Stations.
    Publication info: [Washington, D.C.], [U.S. Dept. of Agriculture, Bureau of Entomology and Plant Quarantine, Division of Insecticide Investigations], 1938
    Holding Institution: University of Florida, George A. Smathers Libraries
    BHL Collections: Expanding Access to Biodiversity Literature
  9. By: Roark, R. C. (Ruric Creegan)
    Publication info: [Washington, D.C.], U.S. Dept. of Agriculture, Bureau of Entomology and Plant Quarantine, Division of Insecticide Investigations, 1936
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  10. By: Roark, R. C. (Ruric Creegan) - United States. Bureau of Chemistry and Soils. Insecticide Division. - United States. Bureau of Entomology and Plant Quarantine. Insecticide Division.
    Publication info: Washington, D.C, [The Bureau], 1934-1935
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  11. By: Roark, R. C. (Ruric Creegan) - United States. Office of Experiment Stations.
    Publication info: [Washington, D.C.], U.S. Dept. of Agriculture, Bureau of Entomology and Plant Quarantine, [1941]
    Holding Institution: University of Florida, George A. Smathers Libraries
    BHL Collections: Expanding Access to Biodiversity Literature
  12. By: Roark, R. C. (Ruric Creegan) - United States. Office of Experiment Stations.
    Publication info: [Washington, D.C.], U.S. Dept. of Agriculture, Agricultural Research Administration, Bureau of Entomology and Plant Quarantine, [1945]
    Holding Institution: University of Florida, George A. Smathers Libraries
    BHL Collections: Expanding Access to Biodiversity Literature
  13. By: Roark, R. C. (Ruric Creegan) - United States. Office of Experiment Stations.
    Publication info: [Washington, D.C.], [United States Department of Agriculture, Agricultural Research Administration, Bureau of Entomology and Plant Quarantine], [1945]
    Holding Institution: University of Florida, George A. Smathers Libraries
    BHL Collections: Expanding Access to Biodiversity Literature
  14. By: Roark, R. C. (Ruric Creegan) - United States. Office of Experiment Stations.
    Publication info: [Washington, D.C.], [U.S. Dept. of Agriculture, Bureau of Entomology and Plant Quarantine], [1945]
    Holding Institution: University of Florida, George A. Smathers Libraries
    BHL Collections: Expanding Access to Biodiversity Literature
  15. By: Roark, R. C. (Ruric Creegan)
    Publication info: [Washington], 1942-1945
    Holding Institution: University of Florida, George A. Smathers Libraries
    BHL Collections: Expanding Access to Biodiversity Literature
  16. By: Roark, R. C. (Ruric Creegan) - United States. Office of Experiment Stations.
    Publication info: [Washington, D.C.], [U.S. Dept. of Agriculture, Bureau of Entomology and Plant Quarantine], [1943]
    Holding Institution: University of Florida, George A. Smathers Libraries
    BHL Collections: Expanding Access to Biodiversity Literature
  17. By: Roark, R. C. (Ruric Creegan)
    Publication info: [Washington, D.C.], United States Department of Agriculture, Agricultural Research Administration, Bureau of Entomology and Plant Quarantine, [1944]
    Holding Institution: University of Florida, George A. Smathers Libraries
    BHL Collections: Expanding Access to Biodiversity Literature
  18. By: Roark, R. C. (Ruric Creegan) - United States. Office of Experiment Stations.
    Publication info: [Washington, D.C.], [U.S. Dept. of Agriculture, Bureau of Entomology and Plant Quarantine], [1943]
    Holding Institution: University of Florida, George A. Smathers Libraries
    BHL Collections: Expanding Access to Biodiversity Literature
  19. By: Roark, R. C. (Ruric Creegan) - United States. Office of Experiment Stations.
    Publication info: [Washington], [United States Department of Agriculture, Bureau of Entomology and Plant Quarantine], [1943]
    Holding Institution: University of Florida, George A. Smathers Libraries
    BHL Collections: Expanding Access to Biodiversity Literature
  20. By: Roark, R. C. (Ruric Creegan) - McIndoo, N. E. (Norman Eugene), - United States. Office of Experiment Stations.
    Publication info: [Washington, D.C.], [United States Department of Agriculture, Agricultural Research Administration, Bureau of Entomology and Plant Quarantine], [1947]
    Holding Institution: University of Florida, George A. Smathers Libraries
    BHL Collections: Expanding Access to Biodiversity Literature