Revegetation equipment catalog. Shaw, N.L.; Gucker, Corey, L., Weidemann, H. ed. Rangeland Technology and Equipment Council. Texas A&M University, USDI Bureau of Land Management, USDA Forest Service, Rocky Mountain Research Station, Rangeland Technology Equipment Council.
Colorado State University, Extension. Native plant seed production. 2010-Present. Fort Collins, CO: Colorado State University Extension. Available: http://wci.colostate.edu/seed_production.shtml