F. A. Sneva, Hyder, D. Nelson, and Cooper, C. Scott,
“The Influence of Ammonium Nitrate on the Growth and Yield of Crested Wheatgrass on the Oregon High Desert”,
Agronomy Journal, vol. 50, no. 1, p. 40, 1958.
F. A. Sneva,
“Paraquat: Effects of Growing Season Applications”,
Journal of Range Management, vol. 23, no. 6, p. 451, 1970.