Biddle, G., & Paul, J. R. (1884). Acts of Assembly and ordinances relating to Philadelphia passenger railways and steam railroads within the city limits: With a digest of Pennsylvania decisions relating to passenger railways. Philadelphia: Printed for the Board of Presidents of Passenger Railway Companies.

Biddle, George, and John Rodman Paul. Acts of Assembly and Ordinances Relating to Philadelphia Passenger Railways and Steam Railroads Within the City Limits: With a Digest of Pennsylvania Decisions Relating to Passenger Railways. Philadelphia: Printed for the Board of Presidents of Passenger Railway Companies, 1884.

Biddle, George, and John Rodman Paul. Acts of Assembly and Ordinances Relating to Philadelphia Passenger Railways and Steam Railroads Within the City Limits: With a Digest of Pennsylvania Decisions Relating to Passenger Railways. Philadelphia: Printed for the Board of Presidents of Passenger Railway Companies, 1884.