[1] Archer B. Hulbert, The Paths of Inland Commerce: A Chronicle of Trail, Road, and Waterway (Worcester, Mass.: 1919), 46.
[2] Frank T. Dale, Bridges over the Delaware River: A History of Crossings ( New Brunswick: Rutgers University Press, 2003), 69-72; Semi-Centennial: The Borough of South Bethlehem, Souvenir History (Bethlehem, PA: Quinlin Printing Company, 1915)
[3] Ibid., 10.
[4] Felix R. Gerard, The Lehigh Valley Railroad, 1846-1946: A Centenary Address (New York: The Newcomen Society of England American Branch, 1946)
[5] http://206.245.141.13/scripts/as_web.exe?file=beth1800.ask&request=killed+street
[6] W. Ross Yates, Joseph Wharton: Quaker Industrial Pioneer (Bethlehem, Lehigh University Press, 1987)
[7] "William Herman Rau: Lehigh Valley Railroad Photographs, 1899," curated by Ricardo Viera, essays by Stephen Perloff, Gerald Bastoni (Bethlehem, Pa. : Lehigh University Art Galleries/Museum Operation, 1989); Guide-Book of the Lehigh Valley Railroad and Its several Branches and Connections; with an account, descriptive and historical, of the places along their route (Philadelphia: J.B. Lippencott, 1873), 76-77; Railroads in the Lehigh Valley, R.L. Kulp, ed. (Allentown: National Railway Historical Society, 1962)
[8] William McKelvey, Lehigh Valley Transit Company's Liberty Bell Route: A Photographic History with Chronology, Historical Recollections, and Bibliography (Berkeley Heights, NJ: Canal Captain's Press, 1989); Frank Whelan. "A History of Allentown: 1901-1916," Allentown, 1762-1987: A 225-Year History Vol.1 (Allentown: Lehigh County Historical Society, 1987), 404.
[9] Frank Whelan, "A History of Allentown, 1921-1929," Allentown, 1762-1987: A 225-Year History (Allentown: Lehigh County Historical Society, 1987), 39.
[10] "A History of Allentown: 1953-1965," Richard D. Krohn, Allentown 1762-1987: A 225-Year History, Mahlon H. Hellerich, editor (Allentown: Pennsylvania: Lehigh County Historical Society, 1987).
[11] Pennsylvania Highways: Today and Tomorrow, 73; Robert H. Wittman, Jr., "A History of Allentown 1966-1975," Allentown 1762-1987: A 225-Year History Vol. 2, Mahlon H. Hellerich, editor (Allentown: Pennsylvania: Lehigh County Historical Society, 1987).
[12] Thomas Dublin and Walter Licht, The Face of Decline: The Pennsylvania Anthracite Region in the Twentieth Century (Ithaca: Cornell University Press, 205), 170; 142-144.
[13] Robert H. Wittman, Jr., "A History of Allentown 1966-1975," Allentown 1762-1987: A 225-Year History Vol. 2, Mahlon H. Hellerich, editor (Allentown: Pennsylvania: Lehigh County Historical Society, 1987).
[14] Frank Whelan, "A History of Allentown: 1921-1929," Allentown, 1762-1987: A 225-Year History (Allentown: Lehigh County Historical Society, 1987), 75.
[15] "Tie That Binds L.V.", Allentown Morning Call, 24 July 1948; "Million Dollar Expansion Program Gets Under Way At Allentown-Bethlehem 'Port," Easton Express, 30 August 1948.
[16] "Easton Joins Airport," Easton Express, 30 August 1948.
[17] Janet Greenstein Potter, Great American Railroad Stations (New York: John Wiley and Sons, 1996), 187-188.

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