TY  - RPRT
TI  - Bibliography of selected reports on USGS international coal-related activities
AU  - John R. SanFilipo
AU  - Peter D. Warwick
PY  - 1998
DO  - 10.3133/ofr98350
UR  - https://pubs.usgs.gov/publication/ofr98350
ID  - ofr98350
ER  -