"Error-Proof Toll Line Code Developed By UNC Experts"
News article from Durham Morning Herald, Durham, NC, dated March 23, 1961, regarding Dr. R.C. Bose and his assistant, Dr. D. K. Chaudhuri. The two University of North Carolina - Chapel Hill professors developed an error-proof mathematical code for transmitting electronic data via toll telephone lines.
"Mathematical Games"
November 1959 article by Martin Gardner in the Scientific American entitled "Mathematical Games" which discusses the work of three mathematicians, including Raj Chandra Bose.