[http://books.google.com/books?id=09_Sr9emceQC&pg=PA113 "Man And His Machines: Electric Blue Printing Machine"]. [http://en.wikipedia.org/wiki/World%27s_Work The World's Work: A History of Our Time] XXXI: 113. November 1915. http://books.google.com/books?id=09_Sr9emceQC&pg=PA113. Retrieved 2009-08-04. | [http://books.google.com/books?id=09_Sr9emceQC&pg=PA113 "Man And His Machines: Electric Blue Printing Machine"]. [http://en.wikipedia.org/wiki/World%27s_Work The World's Work: A History of Our Time] XXXI: 113. November 1915. http://books.google.com/books?id=09_Sr9emceQC&pg=PA113. Retrieved 2009-08-04. |