Cummings, J. A. J. "Cummings' map of Columbia and Montour counties, Penn'a." Map. Chillisquaque, Pa. ; Phil'a Philadelphia: Published by J.A.J. Cummings, ; Engraved & printed by T.S. Wagner., 1860. Norman B. Leventhal Map & Education Center, https://collections.leventhalmap.org/search/commonwealth:4m90f503d (accessed April 19, 2024).