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  • Organic gardening 

    Antonelli, Arthur L.; Byther, Ralph S.; Thornton, Robert Earl, 1933-; Barritt, Bruce Harold, 1942- (Pullman, Washington : Washington State University. Extension., 1982-01)
  • Organic gardening 

    Antonelli, Arthur L.; Byther, Ralph S.; Halvorson, A. R.; Thornton, Robert Earl, 1933-; Barritt, Bruce Harold, 1942- (Pullman, Washington : Washington State University. Extension., 1992-09)