Johnson, D.A.; Asay, K.H.; Jensen, K.B. 2003. Carbon isotope discrimination and yield in 14 cool-season grasses. Journal of Range Management. 56(6): 654-659.
Johnson, D.A.; Asay, K.H.; Jensen, K.B. 2003. Carbon isotope discrimination and yield in 14 cool-season grasses. Journal of Range Management. 56(6): 654-659.