Alka Seltzer-Classic Radio Commercial. http://www.oldtimeradiofans.com/old_radio_commercials/Alka_Seltzer.php
Bodde, Derk. “China’s Gifts to the West.” Committee on Asiatic Studies in American Education, American Council on Education (November 8, 1942). http://afe.easia.columbia.edu/song/readings/inventions_gifts.htm#printing.
Malboro-Classic Radio Commercial. http://www.oldtimeradiofans.com/old_radio_commercials/marlboro.php
Nabisco-Classic Radio Commercials. http://www.oldtimeradiofans.com/old_radio_commercials/nabisco.php
O’Barr, William M. “A Brief History of Advertising in America.” Advertising and Society Review (2005). http://muse.jhu.edu/journals/asr/v006/6.3unit02.html
Pollak, Michael. “The Performance of the Wooden Printing Press.” Library Quarterly 42, no. 2 (April 1972): 218-265. http://www.jstor.org/stable/4306163
Wibley, Charles. “The Jubilee of the Printing Press.” North American Review 171, no. 529 (December 1990): 861-871. http://www.jstor.org/stable/25105096