TY  - BOOK
AU  - Barrall,Irene
TI  - Powerbase: elementary : teacher's book 
SN  - 0582479983
AV  - PE1115  .B37 2002
PY  - 2002///
CY  - Harlow
PB  - Longman
KW  - English language
KW  - Business English
KW  - Study and teaching
ER  -