TY  - RPRT
TI  - Map showing wells drilled for oil and gas deeper than 20,000 feet in the conterminous United States and offshore
AU  - K. I. comiled by Takahashi
AU  - K. I. Cunningham
PY  - 1987
DO  - 10.3133/om220
UR  - https://pubs.usgs.gov/publication/om220
ID  - om220
ER  -