TY  - BOOK
AU  - Alexander, L.G.
TI  - Mainline: progress B 
SN  - 0582519470 (student's book)
U1  - 428.24 22
PY  - 1973///
CY  - London
PB  - Longman
KW  - English language
KW  - Composition and exercises
N1  - Student's book
ER  -