Keller, S. J., & Abdulkareem, T. F. (1980). Post-Knox unconformity--significance at Unionport gas-storage project and relationship to petroleum exploration in Indiana. State of Indiana, Dept. of Natural Resources, Geological Survey.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিKeller, Stanley J., এবং Talal F. Abdulkareem. Post-Knox Unconformity--significance at Unionport Gas-storage Project and Relationship to Petroleum Exploration in Indiana. Bloomington, Ind.: State of Indiana, Dept. of Natural Resources, Geological Survey, 1980.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিKeller, Stanley J., এবং Talal F. Abdulkareem. Post-Knox Unconformity--significance at Unionport Gas-storage Project and Relationship to Petroleum Exploration in Indiana. State of Indiana, Dept. of Natural Resources, Geological Survey, 1980.