In January 1963 Pennzoil purchased 76% of the Wolf's Head Oil Refining Company,South Penn Oil To Secure Stock Of Wolf's Head, The Kane Republican (Kane, PA), January 25, 1963, page 5 and by August of that year they owned 99.56% of Wolf's Head common stock.Pennzoil Net Up For Six Months, The News-Herald (Franklin, PA), August 7, 1963, page 11
