TY  - GEN
AU  - Roy , A. 
AU  - Sharma , P.L. 
TI  - English for students of science
SN  - 8125003959
U1  - 428 
PY  - 1991///
CY  - Hyderabad
PB  - Orient Longman
KW  - English Usage
KW  - English Language
ER  -