TY  - RPRT
TI  - A new method for collection of nitrate from fresh water and the analysis of nitrogen and oxygen isotope ratios
AU  - S. R. Silva
AU  - C. Kendall
AU  - D.H. Wilkison
AU  - A.C. Ziegler
AU  - Cecily C.Y. Chang
AU  - R.J. Avanzino
PY  - 2000
DO  - 10.1016/s0022-1694(99)00205-x
UR  - https://pubs.usgs.gov/publication/70022921
ID  - 70022921
ER  -