TY  - RPRT
TI  - Map showing wells drilled for oil and gas deeper than 15,000 feet in the conterminous United States and offshore
AU  - K.I. Cunningham
PY  - 1987
DO  - 10.3133/om219
UR  - https://pubs.usgs.gov/publication/om219
ID  - om219
ER  -