Detached from: Soil survey of the Boonville area, Indiana / A.W. Mangum and N.P. Neill. In 36th Annual report of Deptartment of Geology and Natural Resources, Indiana. 'U.S. Dept. of Agriculture, Bureau of Soils.' Scale approximately 1:63,000 Soils surveyed by A.W. Mangum and N.P. Neill, 1904.
Mangum, A. W. and Neill, N. P. (Nelson Prentice);cartographer.
Indiana Department of Geology and Natural Resources and William B. Burford