Natural soil groups for planners /
United States Department of Agriculture, Soil Conservation Service.
APA Citation
United States. Soil Conservation Service. (1983). Natural soil groups for planners. Harrisburg, Penn.: The Service.
MLA Citation
United States. Soil Conservation Service. Natural Soil Groups for Planners. Harrisburg, Penn.: The Service, 1983.
Warning: These citations may not always be complete (especially for serials).