TY  - RPRT
TI  - Origin and distribution of tonsteins in late permian coal seams of Southwestern China
AU  - Yinzhu Zhou
AU  - Y.-L. Ren
AU  - B.F. Bohor
PY  - 1982
DO  - 10.1016/0166-5162(82)90015-5
UR  - https://pubs.usgs.gov/publication/70011872
ID  - 70011872
ER  -