The National Water Pollution Control Assessment Model (NWPCAM) version 2.1
Technical report 2 - Point and nonpoint source pollutant loadings
Van Houtven, G., Bondelid, T., Dal Santo, D., Miles, A., Tulloch, M., & Stoddard, A. (2003). The National Water Pollution Control Assessment Model (NWPCAM) version 2.1: Technical report 2 - Point and nonpoint source pollutant loadings. U.S. Environmental Protection Agency, Office of Water.
