(en) Rand, McNally & Co.'s handy map of Chicago and the World's Fair, 1893, Rand, McNally & Co, (lire en ligne).
issn.org
portal.issn.org
(en-US) « NEW YORK'S MAIN HIGHWAYS DESIGNATED BY NUMBERS; Even Numerals Used for North and South Routes and Odd Numbers for East and West Thoroughfares -- Standard Color System », The New York Times, (ISSN0362-4331, lire en ligne, consulté le ).
(en-US) « NEW YORK'S MAIN HIGHWAYS DESIGNATED BY NUMBERS; Even Numerals Used for North and South Routes and Odd Numbers for East and West Thoroughfares -- Standard Color System », The New York Times, (ISSN0362-4331, lire en ligne, consulté le ).