Showing 1 - 6 results of 6 for search 'Gray, R. B. (Roy Burton), 1884-', query time: 0.06s Refine Results
  1. 1
    The agricultural tractor, 1855-1950 /

    The agricultural tractor, 1855-1950 / by Gray, R. B. (Roy Burton), 1884-

    Published 1975
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  2. 2
    Harvesting with combines /

    Harvesting with combines / by Gray, R. B. (Roy Burton), 1884-

    Published 1955
    Search for the full-text version of this title in HathiTrust
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  3. 3
    Fighting the corn borer with machinery in the two-generation area /

    Fighting the corn borer with machinery in the two-generation area / by Reed, C. O. (Chester Otis), 1885-1940

    Published 1930
    Other Authors: “…Gray, R. B. (Roy Burton), 1884-…”
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  4. 4
    Yearbook of Agriculture, 1938

    Yearbook of Agriculture, 1938

    Published 1937
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  5. 5
    Grass, the yearbook of agriculture 1948

    Grass, the yearbook of agriculture 1948

    Published 1947
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  6. 6
    Yearbook of Agriculture, 1943-1947. Science in farming

    Yearbook of Agriculture, 1943-1947. Science in farming

    Published 1946
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