Sorting and sampling farms for soil conservation research.

APA Citation

United States. Bureau of Agricultural Economics., Johnson, N. W. (Neil William). (1939). Sorting and sampling farms for soil conservation research. Washington.

MLA Citation

United States. Bureau of Agricultural Economics, and Neil W. (Neil William) Johnson. Sorting And Sampling Farms for Soil Conservation Research. Washington, 1939.

Warning: These citations may not always be complete (especially for serials).