TY  - RPRT
TI  - Estimates of technically recoverable petroleum resources for continuous-type (unconventional) plays in sandstones, shales, and chalks on Federal Lands of the conterminous United States
AU  - R. A. Crovelli
AU  - J. W. Schmoker
PY  - 1997
DO  - 10.3133/ofr97490
UR  - https://pubs.usgs.gov/publication/ofr97490
ID  - ofr97490
ER  -