TY  - BOOK
AU  -  George,h.v
TI  - Teachers &advanced students guide
T2  - 101 Substitution tables for students of english
SN  - 0521050685
U1  - 415.000 
PY  - 1967///
CY  - london
PB  - cambridege university press
KW  - student guide
ER  -