[by R.A. Gardner ... and others] ; United States Department of Agriculture, Soil Conservation Service in cooperation with the California Agricultural Experiment Station
[by Ralph G. Leighty ... and others] ; United States Department of Agriculture, Soil Conservation Service in cooperation with the Florida Agricultural Experiment Station
prepared by the Minnesota Soil Survey staff of the U.S. Department of Agriculture Soil Conservation Service in cooperation with the Minnesota Agricultural Experiment Station
United States Department of Agriculture, Soil Conservation Service, in cooperation with University of Wisconsin, Wisconsin Geological and Natural History Survey, Soils Department, and Wisconsin Agricultural Experiment Station
by M. H. Layton ... [and others] ; United States Department of Agriculture, Soil Conservation Service ; in cooperation with the University of Nebraska Conservation and Survey Division
[by L.G. Brackeen ... and others] ; United States Department of Agriculture, Soil Conservation Service in cooperation with Alabama Department of Agriculture and Industries
[by Robert Wildermuth ... and others] ; United States Department of Agriculture, Soil Conservation Service in cooperation with the Tennessee Agricultural Experiment Station and the Tennessee Valley Authority