M. Vavra, Rice, R. W., and Hansen, R. M.,
“A Comparison of Esophageal Fistula and Fecal Material to Determine Steer Diets”,
Journal of Range Management, vol. 31, no. 1, p. 11, 1978.
M. Vavra, Rice, R. W., and Bement, R. E.,
“Chemical Composition of the Diet, Intake and Gain of Yearling Cattle on Different Grazing Intensities”,
Journal of Animal Science, vol. 36, no. 2, pp. 411 - 414, 1973.