TY  - RPRT
TI  - Special issue on geostatistical and spatiometrical modeling of coal resources
AU  - Ricardo A. Olea
PY  - 2013
DO  - 10.1016/j.coal.2013.01.010
UR  - https://pubs.usgs.gov/publication/70044282
ID  - 70044282
ER  -