Natural gas in 1920.
Subtitle: Oil field operations, 1920.
Contributors: Estlin, E. S.
Series: Ontario.  Dept. of Mines.  Annual report, v. 30, pt. 5
Publisher: King's Printer
Published: 1922
Place of publication: Toronto
Language: eng
Number of pages: 62
Subjects: Natural gas -- Ontario; Oil fields -- Ontario; Petroleum -- Ontario
Other titles: Natural gas in nineteen twenty
Notes: "Printed by order of the Legislative Assembly of Ontario."