Purdy, G. A.
Petroleum prehistoric to petrochemicals by G. A. Purdy - 1st - Vancouver Copp Clark Pub. Co. 1957 - 492 p. ill. 24 cm.
Petroleum
Petroleum industry and trade.
Petroleum products.
665.5 / PUR/1957
Petroleum prehistoric to petrochemicals by G. A. Purdy - 1st - Vancouver Copp Clark Pub. Co. 1957 - 492 p. ill. 24 cm.
Petroleum
Petroleum industry and trade.
Petroleum products.
665.5 / PUR/1957