- 1Carl Hugh Beal
The decline and ultimate production of oil wells, with notes on the valuation of oil properties
Washington, D.C.: Government Printing Office 1919; XIII, 215 Seiten; graph. Darst., Kt.
Erdöllagerstätte; Fördermenge - 2Carl Hugh Beal; James Ogier Lewis
Some principles governing the production of oil wells
Washington, D.C.: Government Printing Office 1921; IV, 58 Seiten; Ill., graph. Darst., Kt.
Erdöllagerstätte; Erdölbohrung