Road Maps: Handle With Care

Leo Bagrow , History of Cartography (Cambridge Harvard University Press, 1964), p 37

Chusiopher Colles , A Survey of the Roads of the USA 1789 (Cambridge Belknap Press, 1961)

C B Muriel Lock , Modern Maps and Atlases ( London Clive Bingley, 1969)

The Rand McNally Handbook of Map & Globe (3rd Edition, Chicago Rand McNally & Company, 1960), p 269

Roderick C McKenzie , "The Development of Automobile Road Guides in the U S " (unpublished M A thesis) reported in Norman J W Throuin , Maps and Man (Englewood Cliffs, N J Prentice Hall, Inc , 1972), p 139