Free Download Elements of Applied Mathematics… By Ya. B. Zeldovich, A.D. Myskis Publisher Mir Publishers 1976 ISBN 0828507201, 9780828507202 Edition..
Free Download Entropy… By Andreas Greven, Gerhard Keller, Gerald Warnecke (eds.) Publisher Princeton University Press 2003 ISBN 0691113386, 9780691113388..