• Alfalfa Variety Tests

      Howell, Don; Holman, Robert; Parsons, David K.; Dennis, Robert E.; Cluff, Rob (College of Agriculture, University of Arizona (Tucson, AZ), 1978-09)
    • Weed Control in Wheat - September 1978

      Heathman, Stanley; Howell, Don; Stedman, Sam; Farr, Charles (College of Agriculture, University of Arizona (Tucson, AZ), 1978-09)
    • Wheat Variety Tests

      Howell, Don; Holman, Robert A.; Parsons, David K.; Dennis, Robert E.; David, Lewis (College of Agriculture, University of Arizona (Tucson, AZ), 1978-09)