TY  - RPRT
TI  - Probabilistic methodology for GRASS; Gas Resource Assessment Spreadsheet System
AU  - R. A. Crovelli
AU  - R.H. Balay
PY  - 1996
DO  - 10.3133/ofr96296
UR  - https://pubs.usgs.gov/publication/ofr96296
ID  - ofr96296
ER  -