TY  - BOOK
AU  - MCMAHON,APRIL M.S.
TI  - UNDERSTANDING LANGUAGE CHANGE / 
U1  - 417.7 
PY  - 1994///
CY  - [S.N] : 
PB  - CAMBRIBGE UNIVERSITY PRESS ، 
KW  - LINGUISTIC CHANGE
KW  - LANGUAGES
ER  -