TY  - RPRT
TI  - Characterization of the International Humic Substances Society standard and reference fulvic and humic acids by solution state carbon-13 (13C) and hydrogen-1 (1H) nuclear magnetic resonance spectrometry
AU  - Kevin A. Thorn
AU  - Daniel W. Folan
AU  - Patrick MacCarthy
PY  - 1989
DO  - 10.3133/wri894196
UR  - https://pubs.usgs.gov/publication/wri894196
ID  - wri894196
ER  -