Hudson River vehicular tunnel. Contract no. 4. Tunnels between a point about one thousand feet west of the river bulkhead near the line of Twelfth street, Jersey City, and a point about six hundred feet west of the New York pierhead line--two land shafts and two river shafts, New Jersey--New York. Invitation and information for contractors, specifications, forms of contract, bonds and contractor's proposal. Form adopted by the Commissions December 27, 1921

Chicago citation style
New York State Bridge and Tunnel Commission. Hudson River vehicular tunnel. Contract no. 4. Tunnels between a point about one thousand feet west of the river bulkhead near the line of Twelfth street, Jersey City, and a point about six hundred feet west of the New York pierhead line--two land shafts and two river shafts, New Jersey--New York. Invitation and information for contractors, specifications, forms of contract, bonds and contractor's proposal. Form adopted by the Commissions December 27, 1921. 1921. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/008898924. (Accessed November 17, 2018.)
APA citation style
New York State Bridge and Tunnel Commission, (1921) Hudson River vehicular tunnel. Contract no. 4. Tunnels between a point about one thousand feet west of the river bulkhead near the line of Twelfth street, Jersey City, and a point about six hundred feet west of the New York pierhead line--two land shafts and two river shafts, New Jersey--New York. Invitation and information for contractors, specifications, forms of contract, bonds and contractor's proposal. Form adopted by the Commissions December 27, 1921. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/008898924
MLA citation style
New York State Bridge and Tunnel Commission. Retrieved from the Digital Public Library of America <http://catalog.hathitrust.org/Record/008898924>.
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