The erosion-productivity index simulator model /
John W. Putman ... [et al.].
APA Citation
Putman, J. W., United States. Dept. of Agriculture. Natural Resource Economics Division. (1987). The erosion-productivity index simulator model. [Washington, DC]: U.S. Dept. of Agriculture, Economic Research Service, Natural Resource Economics Division.
MLA Citation
Putman, John W, and United States. Dept. of Agriculture. Natural Resource Economics Division. The Erosion-productivity Index Simulator Model. [Washington, DC]: U.S. Dept. of Agriculture, Economic Research Service, Natural Resource Economics Division, 1987.
Warning: These citations may not always be complete (especially for serials).