Category	Citation
Presentation	Cook, J. G., L. L. Irwin, L. D. Bryant, R. A. Riggs, D. A. Hengel, and J. W. Thomas. 1994. Studies of elk biology in northeast Oregon. National Council of the Paper Industry for Air and Stream Improvement, Corvallis, Oregon, USA.
Publication	Riggs, R. A., J. G. Cook, L. L. Irwin, and J. L. Spicer. 1993. Relating timber management to cover for big game on interior northwest winter range: some thoughts on reducing conflict. Pages 18-36 in R. L. Callas, E. B. Koch, and E. R. Loft, editors. Proceedings of the Western States and Provinces Elk Workshop. Cali
Publication	Irwin, L. L., J. G. Cook, R. A. Riggs, and J. M. Skovlin. 1994. Effects of long-term grazing by big game and livestock in the Blue Mountains forest ecosystems. U.S. Forest Service General Technical Report PNW-GTR-325.
Publication	Cook, J. G., L. L. Irwin, L. D. Bryant, and J. W. Thomas. 1994. Fecal nitrogen and dietary quality relationships in juvenile elk. Journal of Wildlife Management 58:46-53.
Publication	Cook, J. G., R. A. Riggs, A. R. Tiedemann, L. L. Irwin, and L. D. Bryant. 1994. Large herbivore-vegetative feedback relations in the Blue Mountains ecoregion. Pages 155-159 in W. D. Edge and S. L. Olson-Edge, editors. Proceedings of a symposium on sustaining rangeland ecosystems. Oregon State University Extension Service Special Re
Publication	Cook, J. G., T. W. Stutzman, C. W. Bowers, K. A. Brenner, and L. L. Irwin. 1995. Spherical densiometers produce biased estimates of forest canopy cover. Wildlife Society Bulletin 23:711-717.
Publication	Cook, J. G., L. J. Quinlan-Murphy, L. L. Irwin, L. D. Bryant, R. A. Riggs, and J. W. Thomas. 1996. Nutrition-growth relations of elk calves during late summer and fall. Journal of Wildlife Management 60:528-541.
Publication	Cook, J. G.; Irwin, L. L.; Bryant, L. D.; Riggs, R. A.; Thomas, J. W. 1998. Relations of forest cover and condition of elk: a test of the thermal cover hypothesis in summer and winter. Wildlife Monographs No. 141:1- 61p.
Publication	Riggs, R. A.; Tiedemann, A. R.; Cook, J. G.; Ballard, T. M.; Edgeton, P. J.; Vavra, M.; Krueger, W. C.; Hall, F. C.; Bryant, L. D.; Irwin, L. L.; DelCurto, T. 2000. Modification of mixed-conifer forests by ruminant herbivores in the Blue Mountains Ecological Province. USDA Forest Service, Pacific Northwest Research Station Research Paper PNW-RP-527.
Publication	Irwin, L. L. 2002. Migration. Chapter 10 in D. Toweill and J. W. Thomas, editors. North American Elk: ecology and management. Second edition. Smithsonian Institution Press, 2002.
Publication	Cook, J. G., B. K. Johnson, R. C. Cook, R. A. Riggs, T. DelCurto, L. D. Bryant, L. L. Irwin 2004. Effects of summer-autumn nutrition and parturition date on reproduction and survival of elk. Wildlife Monographs 155:1-61
Publication	Cook, J. G., B. K. Johnson, R. C. Cook, R. A. Riggs, T. DelCurto, L. D. Bryant, and L. L. Irwin 2005. Nutrition and parturition date effects elk: Potential implications for research and management. March 20, 2004. Transactions of the North American Wildlife and Natural Resources Conference 69.
Publication	Cook, J. G., L. L. Irwin, L. D. Bryant, R. A. Riggs, and J. W. Thomas 2005. Thermal cover needs of large ungulates: A review of hypothesis tests. March 20, 2004. Transactions of the North American Wildlife and Natural Resources Conference 69.
Publication	Riggs, R. A., J. G. Cook, and L. L. Irwin 2005. Management implications of ungulate herbivory in Northwest forest ecosystems. March 20, 2004. Transactions of the North American Wildlife and Natural Resources Conference 69.