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Browsing Extension Service -- Circulars / Extension Circulars by Author "Leffel, John"

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Browsing Extension Service -- Circulars / Extension Circulars by Author "Leffel, John"

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  • Oregon State University. Extension Service; Hannaway, David B.; Youngberg, Harold Wayne, 1929-; McGuire, William S.; Adams, H. P. (Holyoke Purinton), 1922-; Claypool, Donald W., 1929-; Leffel, John (Corvallis, Or. : Extension Service, Oregon State University, 1983-07)
  • Oregon State University. Extension Service; Johnson, Dexter W.; Thomas, Dave; Leffel, John (Corvallis, Or. : Extension Service, Oregon State University, 1981-09)

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