Wells, Bruce A. (September 16, 2010). "This Week in Petroleum History". The American Oil & Gas Historical Society. Archived from the original on July 27, 2020. Retrieved October 6, 2010.
Wells, Bruce A. (September 16, 2010). "This Week in Petroleum History". The American Oil & Gas Historical Society. Archived from the original on July 27, 2020. Retrieved October 6, 2010.