General highway and transportation map, Blackford County, Indiana
Blueline. 'State roads revised to January 1, 1949.' '1937.' 'Data obtained from 'Statewide Highway Planning Survey.' '5.' Includes location map, chart of 'Culture in unincorporated places' and inset of Dunkirk Indiana. Scale approximately 1:130,000. Not '1 inch =1 mile.'; Polyconic projection Prepared by the State Highway Commission of Indiana in cooperation with the U.S. Department of Agriculture, Bureau Public Roads.