Oregon State College. Federal Cooperative Extension Service; McWhorter, O. T.(Corvallis, Or. : Federal Cooperative Extension Service, Oregon State College, 1944-06)
Oregon State College. Federal Cooperative Extension Service; McWhorter, O. T.; Cyrus, Wm. F.(Corvallis, Or. : Federal Cooperative Extension Service, Oregon State College, 1939-06)
Oregon State College. Federal Cooperative Extension Service; McWhorter, O. T.(Corvallis, OR : Federal Cooperative Extension Service, Oregon State College, 1943-09)
Oregon State College. Federal Cooperative Extension Service; McWhorter, O. T.(Corvallis, Or. : Federal Cooperative Extension Service, Oregon State College, 1942-08)
Oregon State College. Federal Cooperative Extension Service; McWhorter, O. T.; Jackman, E. R. (Edwin Russell), 1894-; King, Arthur(Corvallis, Or. : Federal Cooperative Extension Service, Oregon State College, 1937-08)
Oregon State College. Federal Cooperative Extension Service; McWhorter, O. T.; Jackman, E. R. (Edwin Russell), 1894-; King, Arthur(Corvallis, Or. : Federal Cooperative Extension Service, Oregon State College, 1945-02)
Oregon State College. Federal Cooperative Extension Service; Jackman, E. R.; McWhorter, O. T.(Corvallis, Or. : Federal Cooperative Extension Service, Oregon State College, 1943-03)
Oregon State College. Federal Cooperative Extension Service; McWhorter, O. T.(Corvallis, Or. : Federal Cooperative Extension Service, Oregon State College, 1940-05)
Oregon State College. Federal Cooperative Extension Service; McWhorter, O. T.(Corvallis, Or. : Federal Cooperative Extension Service, Oregon State College, 1938-12-14)
Oregon State College. Federal Cooperative Extension Service; McWhorter, O. T.; Zeller, S. M.; Rieder, R. E.(Corvallis, Or. : Federal Cooperative Extension Service, Oregon State College, 1945-08)
Oregon State College. Federal Cooperative Extension Service; McWhorter, O. T.; Zeller, S. M.(Corvallis, Or. : Federal Cooperative Extension Service, Oregon State College, 1940-03)
Oregon State College. Federal Cooperative Extension Service; Zeller, S. M.; McWhorter, O. T.(Corvallis, Or. : Federal Cooperative Extension Service, Oregon State College, 1939-03)
Oregon State College. Federal Cooperative Extension Service; McWhorter, O. T.(Corvallis, Or. : Federal Cooperative Extension Service, Oregon State College, 1940-11)
Oregon State College. Agricultural Experiment Station; Waldo, George F. (George Fordyce), b. 1898.; Brown, W. S. (Walter Sheldon), 1878-; McWhorter, O. T.([Corvallis, Or.] : Agricultural Experiment Station, Oregon State College, 1933-04)
Oregon State College. Federal Cooperative Extension Service; McWhorter, O. T.(Corvallis, Or. : Federal Cooperative Extension Service, Oregon State College, 1943-05)
Oregon State College. Federal Cooperative Extension Service; McWhorter, O. T.(Corvallis, Or. : Federal Cooperative Extension Service, Oregon State College, 1945-03)