File:East Broad Top Railroad and Coal Company, Blacksmith Shop, State Route 994, West of U.S. Route 522, Rockhill Furnace, Huntingdon County, PA HAER PA,31-ROCFN,1C- (sheet 2 of 6).png - Wikimedia Commons
File:East Broad Top Railroad and Coal Company, Machine Shop, State Route 994, West of U.S. Route 522, Rockhill Furnace, Huntingdon County, PA HAER PA,31-ROCFN,1A- (sheet 2 of 7).png - Wikimedia Commons
Route 31 Bike, Board & Ski | Somerset PA
LYNX 31-Day Pass Senior/Disabled (Age 65+/Disabled/Medicare) – WestCAT Online Tickets and Store
2 Route 31 S Pennington, NJ 08534 - Retail Property for on Showcase.com
Historic Route 31, South Bend to Indianapolis | 12" Metal Sign – InRugCo Studio & Gift Shop