TY  - BOOK
AU  - Raisinghania, M D 
AU  - Saxena, H C 
AU  - Das, H K
TI  - Simplified Course in Trigonometry
SN  - 9788121918589
U1  - 514.5 
PY  - 1999///
CY  - New Delhi
PB  - S. Chand & Company Ltd.
ER  -