TY  - RPRT
TI  - Nitrogen and phosphorus data for surface water in the Upper Colorado River basin, Colorado, 1980-94
AU  - K. H. Wynn
AU  - N.E. Spahr
PY  - 1997
DO  - 10.3133/ofr97233
UR  - https://pubs.usgs.gov/publication/ofr97233
ID  - ofr97233
ER  -