Report of the Geological survey of Ohio Vol. 11: Bulletins 12-15 of the 4th Series
Title page and Table of Contents (Pages i-viii) pub. 1913
The Bremen Oil Field, by J.A. Bownocker, 68 p., illus., 1910
The Maxville Limestone, by William Clifford Morse, 128 p., illus., 1910.
Geology of the Columbus Quadrangle, by Clinton R. Stauffer, Goerge D. Hubbard and J.A. Bownocker, 133 p., illus., 1911. Maps Topography; Historical or Areal Geology; and Physiography or Surficial Geology (at end of Volume 11)
The Devonian and Mississippian Formations of Northeastern Ohio, by Charles S. Prosser, 574 p., illus., 1912