"New Subway Opened". New-York Tribune. June 4, 1917. p. 5. ProQuest575722451.
"Subway Joins Times Square to Penn. Station: Parts of Express Stations of 7th Av. Route Opened to the Public". New-York Tribune. June 10, 1917. p. B6. ProQuest575732261.
"7th Avenue Subway System Is Opened To Public To-day: First Train Will Start at 2 O'Clock This Afternoon". New-York Tribune. July 1, 1918. p. 9. ProQuest575909557.
"Transit Unification Completed As City Takes Over I. R. T. Lines: Systems Come Under Single Control After Efforts Begun in 1921; Mayor Is Jubilant at City Hall Ceremony Recalling 1904 Celebration". New York Herald Tribune. June 13, 1940. p. 25. ProQuest1248134780.
"3-Dimensional Lit-Up Posters Invade Subway: First of Projected 480 for 6 Key Stations Set Up at Grand Central I. R. T". New York Herald Tribune. October 6, 1948. p. 14. ISSN1941-0646. ProQuest1327435571.
"3-Dimensional Lit-Up Posters Invade Subway: First of Projected 480 for 6 Key Stations Set Up at Grand Central I. R. T". New York Herald Tribune. October 6, 1948. p. 14. ISSN1941-0646. ProQuest1327435571.