TY  - BOOK
AU  - Abercrombie,David
TI  - Problems and principles in language study
SN  - 0582525004
U1  - 428/A144p 
PY  - 1956///, 2nd 1963, rep. 1976
CY  - London
PB  - Longman
KW  - Language and languages
KW  - Study and teaching
ER  -