The Nuttall Encyclopedia
On the Alleghany River, Pennsylvania, by rail 130 m. N. of Pittsburg, is the centre of a great oil-trade and oil-refining industry; there are also engineer and boiler works; it suffered severely from floods in 1892.
Wood, James, ed. Entry for 'Oil City'. The Nuttall Encyclopedia. https://www.studylight.org/encyclopedias/eng/nut/o/oil-city.html. Frederick Warne & Co Ltd. London. 1900.