United States Department of Agriculture, Soil Conservation Service ; in cooperation with Purdue University Agricultural Experiment Station and Indiana Department of Natural Resources, Soil and Water Conservation Committee
United States Department of Agriculture, Soil Conservation Service ; in cooperation with Purdue University Agricultural Experiment Station, and the Indiana Department of Natural Resources, Soil and Water Conservation Committee
United States Department of Agriculture, Soil Conservation Service, in cooperation with Purdue University Agricultural Experiment Station and the Indiana Department of Natural Resources, Soil and Water Conservation Committee
United States Department of Agriculture, Soil Conservation Service ; in cooperation with Purdue University Agricultural Experiment Station and Indiana Department of Natural Resources, Soil and Water Conservation Committee