SAMUELS , M .L . LINGUISTIC EVOLUTION : with special reference to English - London : CAMBRIDGE UNIVERSITY PRESS , 1972 . - ix , 203 p . : ill . : maps , tables ; 23 cm . - CAMBRIDGE STUDIES IN LINGUISTIS . 5 . includes index ISBN: 0521099137 Subjects--Topical Terms: Language Dewey Class. No.: DDC410 SAM / 2