TY  - RPRT
TI  - Estimates of undiscovered recoverable resources of total gas by province; statistical background data for U.S. Geological Survey Circular 860
AU  - K. L. Varnes
AU  - G.L. Dolton
AU  - Ronald R. Charpentier
PY  - 1982
DO  - 10.3133/ofr82666d
UR  - https://pubs.usgs.gov/publication/ofr82666D
ID  - ofr82666D
ER  -