TY - RPRT TI - Using dual-bacterial denitrification to improve δ15N determinations of nitrates containing mass-independent 17O AU - Tyler B. Coplen AU - J.K. Bohlke AU - Karen L. Casciotti PY - 2004 DO - 10.1002/rcm.1318 UR - https://pubs.usgs.gov/publication/70027435 ID - 70027435 ER -