prepared by United States Department of Agriculture, Economic Research Service, Forest Service, Soil Conservation Service ; in cooperation with Montana Department of Natural Resources and Conservation ; under direction of USDA Field Advisory Committee
U.S. Department of Agriculture, Soil Conservation Service, Economic Research Service, Forest Service ; in cooperation with Wyoming State Engineers Office and Montana Water Resources Board
U.S. Department of Agriculture, Soil Conservation Service, Economic Research Service, Forest Service ; in cooperation with Wyoming State Engineers Office and Montana Water Resources Board
U.S. Department of Agriculture, Soil Conservation Service [and] Economic Research Service [and] Forest Service, in cooperation with the states of Arizona and New Mexico