(Cambridge University Press, 1997) ISBN 0-521-45924-9* Winfred P. Lehmann, "Historical Linguistics: An Introduction" (Holt, 1962) ISBN 0-03-011430-6* R.L.
(Cambridge University Press, 1997) ISBN 0-521-45924-9*Winfred P. Lehmann, "Historical Linguistics: An Introduction" (Holt, 1962) ISBN 0-03-011430-6*R.L.