compiled by the State Cartographer's Office under the direction of Art Ziegler ; Christina Erikson, assistant editor, Bettejane Wooding, production manager
United States Department of Agriculture, Soil Conservation Service ; in cooperation with United States Department of Agriculture, Forest Service; United States Department of the Interior, Bureau of Land Management; and the Regents of the University of California (Agricultural Experiment Station)
United States Department of Agriculture, Soil Conservation Service ; in cooperation with United States Department of Agriculture, Forest Service, and Mississippi Agricultural and Forestry Experiment Station
compiled by the State Cartographer's Office under the direction of Art Ziegler ; Christina Erikson, assistant editor, John Laedlin, projects coordinator, Bettejane Wooding, assistant production manager
United States Department of Agriculture, Soil Conservation Service ; in cooperation with University of Florida, Institute of Food and Agricultural Sciences, Agricultural Experiment Stations, and Soil Science Department; and Florida Department of Agriculture and Consumer Services
United States Department of Agriculture, Soil Conservation Service ; in cooperation with United States Department of Agriculture, Forest Service; Arkansas Agricultural Experiment Station; and United States Department of the Interior, National Park Service
a cooperative project between Burnett County Soil and Water Conservation District, the Northwest Regional Planning Commission and the U.S. Soil Conservation Service