Hole, Allen David,1866-1940, Mills, J. Blair (Soil surveyor), Morris, Ralph C. Z. (Soil surveyor), and Barnes, Elmer (Soil surveyor)
Detached from: Soil survey of Jay County / Allen David Hole. In 39th Annual report of Department of Geology and Natural Resources, Indiana. Scale approximately 1:84,000 Soils surveyed in 1914 by Allen D. Hole, assisted by J. Blair Mills, Ralph C.Z. Morris, and Elmer Barnes.