History and Heritage of Civil Engineering, ASCE, Tunkhannock Viaduct
http://www.asce.org/history/brdg_thannock.html
Referenced in:
Tunkhannock Viaduct
History and Heritage of Civil Engineering, ASCE, Tunkhannock Viaduct
http://www.asce.org/history/brdg_thannock.html
Referenced in:
Tunkhannock Viaduct