TY  - BOOK
AU  - Richardson,G.B.
TI  - Petroleum in 1919-1921
T2  - Mineral Resources of the United States, 1921-Part II
U1  - 553 
PY  - 1923///
CY  - Washington, D.C.
PB  - Government Printing Office
KW  - MINERIA
KW  - PETROLEO
N1  - Impreso
ER  -