• Breeding Alfalfa To Have More Resistance To Parasites

      Schonhorst, M. H.; Roth, V. D.; Nielson, M. W.; Agronomy Department; Entomology Research Division, U.S. Department of Agriculture; Entomology Research Division, U.S. Department of Agriculture (College of Agriculture, University of Arizona (Tucson, AZ), 1959)