TY  - BOOK
AU  - SWAN,MICHAEL
TI  - LEARNER ENGLISH / 
U1  - 428.007 
PY  - 1987///
CY  - [S.N] : 
PB  - CAMBRIBGE UNIVERSITY PRESS ، 
KW  - STUDY AND TEACHING
KW  - ENGLISH LANGUAGE
KW  - SPOKEN ENGLISH
ER  -