TY  - RPRT
TI  - Carbon and nitrogen isotopic compositions of particulate organic matter in four large river systems across the United States
AU  - C. Kendall
AU  - S. R. Silva
AU  - V.J. Kelly
PY  - 2001
DO  - 10.1002/hyp.216
UR  - https://pubs.usgs.gov/publication/70023269
ID  - 70023269
ER  -