Shows oil and gas wells for the Petersburg oil field in Pike County, Indiana. Detached from: Structural geology / Edward Barrett. In Forty-first annual report of Dept. of Geology and Natural Resources, Indiana, 1916. Fort Wayne, Ind.: Fort Wayne Printing Co., 1917. Page 107.
Imprint: [Fort Wayne, Ind.] : [Indiana Dept. of Geology and Natural Resources], [1917]; Imprint: [Fort Wayne, Ind.] : Fort Wayne Printing Co., [1917]
Dimensions: 47 x 57 cm; Scale: Approximately 1:33,000