TY  - BOOK
AU  - Magoon,Leslie B.
ED  - United States.
TI  - Petroleum systems of the United States
U1  - 557.3 
PY  - 1988///
CY  - Washington
PB  - U.S. Govt. Prin. Offic.
KW  - Petroleum
KW  - Geology
KW  - United States
KW  - Petroleum reserves
N1  - Prepared by members of the U.S. Geological Survey; Includes bibliographical references
ER  -