TY  - BOOK
AU  - Purdy, G. A.
TI  - Petroleum: prehistoric to petrochemicals
U1  - 665.5 
PY  - 1958///
CY  - New York
PB  - Mcgraw-Hill
KW  - Petroleum
KW  - Petroleum Industry & Trade
KW  - Petroleum Industry & Trade -- Canada
ER  -