R. F. Miller, Haferkamp, M. Roy, and Angell, R. F.,
“Clipping Date Effects on Soil Water and Regrowth in Crested Wheatgrass”,
Journal of Range Management, vol. 43, no. 3, p. 253, 1990.
R. F. Angell, Miller, R. F., and Haferkamp, M. Roy,
“Variability of Crude Protein in Crested Wheatgrass at Defined Stages of Phenology”,
Journal of Range Management, vol. 43, no. 3, p. 186, 1990.