TY  - RPRT
TI  - Contributions to economic geology, 1909, part II, mineral fuels--Petroleum and natural gas
AU  - A.G. Leonard
AU  - H. E. Gregory
AU  - Chester Wesley Washburne
AU  - Robert Anderson
PY  - 1911
DO  - 10.3133/b431a
UR  - https://pubs.usgs.gov/publication/b431A
ID  - b431A
ER  -