TY - RPRT TI - Computer spreadsheets for an assessment of in-place gas resources in the low-permeability basin-centered gas accumulation of the Bighorn Basin, Wyoming and Montana AU - R. A. Crovelli AU - R. C. Johnson AU - B.G. Lowell PY - 1999 DO - 10.3133/ofr99315b UR - https://pubs.usgs.gov/publication/ofr99315B ID - ofr99315B ER -