TY  - RPRT
TI  - Documentation and analysis of a geographic information system application for combining data layers, using nonpoint-source pollution as an example
AU  - James L. Kiesler
PY  - 2002
DO  - 10.3133/ofr00324
UR  - https://pubs.usgs.gov/publication/ofr00324
ID  - ofr00324
ER  -