TY  - BOOK
AU  - Gray,Joanna
AU  - Thorn,Michael
TI  - Thinking English: teacher's book 
T2  - Cassell's foundation English
SN  - 0304306266
PY  - 1982///
CY  - London
PB  - Cassell
KW  - English language
KW  - Textbooks for foreign speakers
ER  -