Keywords: Old Glassworks historical marker.jpg 39 48 6 N 79 54 50 5 W Historical marker at the site of the former w New Geneva Glass Works glass factory and namesake for Glassboro Pennsylvania Glassboro in Monongahela Township Greene County Pennsylvania Monongahela Township Greene County Pennsylvania Greene County Pennsylvania United States own 2014-09-27 User Nyttend Nyttend Marker and photo respectively PD-US-no notice Glass industry in the United States Greene County Pennsylvania Historical markers in Pennsylvania Signs by User Nyttend |