D. Nelson Hyder, Conrad, C. E., Tueller, P. T., Calvin, L. D., Poulton, C. E., and Sneva, F. A.,
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Ecology, vol. 44, no. 4, pp. 740 - 746, 1963.
D. Nelson Hyder, Sneva, F. A., and Calvin, L. D.,
“Chemical Control of Sagebrush Larkspur”,
Journal of Range Management, vol. 9, no. 4, p. 184, 1956.