TY  - RPRT
TI  - Nuclear magnetic resonance studies of ancient buried wood-II. Observations on the origin of coal from lignite to bituminous coal
AU  - Patrick G. Hatcher
AU  - Irving A. Breger
AU  - Nikolaus Szeverenyi
AU  - G.E. Maciel
PY  - 1982
DO  - 10.1016/0146-6380(82)90003-1
UR  - https://pubs.usgs.gov/publication/70011679
ID  - 70011679
ER  -