Beginnings of the Petroleum Industry in Pennsylvania: A Series of wood engravings by John DePol. Printed by Hamilton Division Security-Columbian Banknote Company. [1959] This series was commissioned by the Erie Natural Gas Company, New York, for a report, "Oil in Pennsylvania" by H. Edward Wolf and issued "on the eve of the centennial of the founding of the petroleum industry in Pennsylvania in 1859." Portfolio included eight two-color engravings by DePol, published as a keepsake by the Security-Columbian Banknote Company

Beginnings of the Petroleum Industry in Pennsylvania: A Series of wood engravings by John DePol. Printed by Hamilton Division Security-Columbian Banknote Company. [1959] This series was commissioned by the Erie Natural Gas Company, New York, for a report, "Oil in Pennsylvania" by H. Edward Wolf and issued "on the eve of the centennial of the founding of the petroleum industry in Pennsylvania in 1859." Portfolio included eight two-color engravings by DePol, published as a keepsake by the Security-Columbian Banknote Company, Box: 3, Folder: 20-A. John DePol Collection, GB 2. New Brunswick Special Collections. https://archives.libraries.rutgers.edu/repositories/11/archival_objects/33212 Accessed December 22, 2024.