UNITED-STATES TRANSPORT ADVANCE AND EXTERNALITIES

[31] *MA RAILR CORP, 1844, 1843 ANN REP, P72

[32] *MA RAILR CORP, 1844, 1843 ANN REP

[33] *MA STAT COMM, 1870, REP, P121

[34] MCDOUGALL, 1854, HUNTS MERCHANTS MAGA, P633

[35] MCNEIL WG, 1839, COLUMBIA TELESC 1019

[36] *MI DIR CENTR RAIL, 1849, 3RD ANN REP, P15

[37] NEVINS A, 1966, QUART J ECONOMICS, V80, P82

[38] *NY CAN COMM, 1871, ANN REP, P221

[39] *NY CAN COMM, 1871, ANN REP, P217

[40] *NY COMM CAN, 1899, REP, P151

[31] *MA RAILR CORP, 1844, 1843 ANN REP, P72

[32] *MA RAILR CORP, 1844, 1843 ANN REP

[33] *MA STAT COMM, 1870, REP, P121

[34] MCDOUGALL, 1854, HUNTS MERCHANTS MAGA, P633

[35] MCNEIL WG, 1839, COLUMBIA TELESC 1019

[36] *MI DIR CENTR RAIL, 1849, 3RD ANN REP, P15

[37] NEVINS A, 1966, QUART J ECONOMICS, V80, P82

[38] *NY CAN COMM, 1871, ANN REP, P221

[39] *NY CAN COMM, 1871, ANN REP, P217

[40] *NY COMM CAN, 1899, REP, P151