TY  - RPRT
TI  - Geochemistry of Selected Coal Samples from Sumatra, Kalimantan, Sulawesi, and Papua, Indonesia
AU  - Harvey E. Belkin
AU  - Susan J. Tewalt
PY  - 2007
DO  - 10.3133/ofr20071202
UR  - https://pubs.usgs.gov/publication/ofr20071202
ID  - ofr20071202
ER  -