TY  - RPRT
TI  - A new organic reference material, L-glutamic acid, USGS41a, for δ 13 C and δ 15 N measurements − a replacement for USGS41
AU  - Haiping Qi
AU  - Tyler B. Coplen
AU  - Stanley J. Mroczkowski
AU  - Willi A. Brand
AU  - Lauren Brandes
AU  - Heike Geilmann
AU  - Arndt Schimmelmann
PY  - 2016
DO  - 10.1002/rcm.7510
UR  - https://pubs.usgs.gov/publication/70177884
ID  - 70177884
ER  -