prepared by United States Department of Agriculture, Forest Service, Alaska Region Public Services.United States Department of Agriculture, Forest Service, Alaska Region1997.<Y622-B4>
United States Department of Agriculture, Natural Resources Conservation Service, in cooperation with Dairy Industry [and 8 others].United States Department of Agriculture, Natural Resources Conservation Service[1996]<Y622-B25>
prepared by the U.S. Department of Agriculture, Natural Resources Conservation Service, Lakewood, Colorado in cooperation with the Colorado Water Conservation Board, El Paso County and the Town of Calhan.United States Department of Agriculture, Natural Resources Conservation Service[1995]<Y622-B27>