Choudhury, D. Roy. creator text 90 New Age Science 2014 2nd ed. monographic KE Networks and Systems 1906574243 (hardcover) 9781906574246 (hardcover) http://www.amazon.com/exec/obidos/ASIN/1906574243/chopaconline-20 http://www.amazon.com/exec/obidos/ASIN/1906574243/chopaconline-20