TY  - BOOK
AU  - Heaton,J.B.
TI  - Longman Preliminary English Skills: A skills and practice course for the Cambridge Preliminary English Test 
SN  - 0-582-01843-9
PY  - 1990///
CY  - London
PB  - Longman
KW  - English Languages
KW  - Practice course
ER  -