1907 – U.S. Geological Survey – Topography Map
New Jersey – Pennsylvania – Trenton Quadrangle
Edition of April 1907; Scale 1/62500
Much of Mercer County – Lambertville to Trenton west to Hightstown
Includes box symbols for buildings
Tag – MercerCty
File – 1907-MercerCty-USGS-NJ-Topo-Trenton-USGS.jpg
