TY  - RPRT
TI  - Use of solid-state 13C NMR in structural studies of humic acids and humin from Holocene sediments
AU  - Patrick G. Hatcher
AU  - D.L. VanderHart
AU  - W.L. Earl
PY  - 1980
DO  - 10.1016/0146-6380(80)90024-8
UR  - https://pubs.usgs.gov/publication/70012278
ID  - 70012278
ER  -