TY  - BOOK
AU  - Charles M. Jacobs
TI  - ASCE  Vol. LXVIII, Sept. 1910: The New York Tunnel Extension of the Pennsylvania Railroad
KW  - Technology
UR  - https://new.zodml.org/sites/default/files/2023-07/transactions_of_the_american_society_of_civil_engineers_vol._lxviii_sept._1910_by_charles_m._jacobs_tag_civil_engineering_periodicals_railroad_tunnels_design_and_construction.epub
ER  -