TY  - RPRT
TI  - Petroleum and natural gas
AU  - Ralph Arnold
AU  - G. B. Richardson
AU  - Chester Wesley Washburne
AU  - A.R. Schultz
PY  - 1908
DO  - 10.3133/b340f
UR  - https://pubs.usgs.gov/publication/b340F
ID  - b340F
ER  -