References
- ↑ U.S. Geological Survey Geographic Names Information System: Neptune, Ohio
- ↑ Scranton, S. S. (1907). History of Mercer County, Ohio, and Representative Citizens. Biographical Publishing Company. p. 128.
- ↑ "Mercer County". Jim Forte Postal History. Retrieved December 18, 2015.
- ↑ Portrait and Biographical Record of Leavenworth, Douglas and Franklin Counties, Kansas: Containing Portraits, Biographies and Genealogies of Well Known Citizens of the Past and Present. Chapman publishing Company. 1899. p. 199.
Municipalities and communities of Mercer County, Ohio, United States | ||
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| Footnotes | ‡This populated place also has portions in an adjacent county or counties | |
40°36′11″N 84°29′30″W / 40.60306°N 84.49167°W
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