Oregon State College. Federal Cooperative Extension Service; Cosby, H. E. (Hubert Elmer), 1887-(Corvallis, Or. : Federal Cooperative Extension Service, Oregon State College, 1945-03)
Oregon State College. Federal Cooperative Extension Service; Knowlton, Frank L. (Frank Lester), 1894-1940(Corvallis, Or. : Federal Cooperative Extension Service, Oregon State College, 1938-05)
Oregon State College. Federal Cooperative Extension Service; Cosby, H. E. (Hubert Elmer), 1887-(Corvallis, Or. : Federal Cooperative Extension Service, Oregon State College, 1948-04)
Oregon State College. Federal Cooperative Extension Service; Cosby, H. E. (Hubert Elmer), 1887-; Bennion, N. L. (Noel Lindsay), 1903-(Corvallis, Or. : Federal Cooperative Extension Service, Oregon State College, 1953-02)
Oregon State Agricultural College. Extension Service; Barss, H. P. (Howard Phillips), 1885-; Mote, Don C. (Don Carlos), 1887-(Corvallis, Or. : Extension Service, Oregon State Agricultural College, 1931-01)
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; McWhorter, O.T.; Jackman, E. R. (Edwin Russell), 1894-; King, Arthur(Corvallis, Or. : Federal Cooperative Extension Service, Oregon State College, 1951-06)
Barss, H. P. (Howard Phillips), 1885-; Lovett, A. L. (Arthur Lester), 1885-1924; Oregon Agricultural College. Extension Service; Gardner, Victor Ray, 1885-(Corvallis, OR : Oregon Agricultural College, Extension Service, 1916)