TY - RPRT TI - Preparation and analysis of nitrogen-bearing compounds in water for stable isotope ratio measurement AU - Cecily C.Y. Chang AU - Steven R. Silva AU - Carol Kendall AU - Greg Michalski AU - Karen L. Casciotti AU - Scott D. Wankel PY - 2004 DO - 10.1016/b978-044451114-0/50017-x UR - https://pubs.usgs.gov/publication/70239132 ID - 70239132 ER -