TY  - BOOK
AU  - Bhattarai, H.N.
AU  - Adhikari, D.B.
AU  - Gyawali, M.S.
TI  - Optional mathematics: A preliminary introduction
SN  - 9993328103
U1  - 510/Bh4693o 
PY  - 2002///
CY  - Kathmandu
PB  - Himalaya Book Stall
KW  - Mathematics
KW  - Arithmetic
KW  - Trigonometry
ER  -