TY  - BOOK
AU  - Ek, J.A.Van
TI  - The threshold level:  for modern language learning in schools 
SN  - 582557003
U1  - 420.7 
PY  - 1979///
CY  - Lndon
PB  - Longman
KW  - English language
N1  - Includes bibliography
ER  -