TY  - BOOK
AU  - Priyadarshi, Saurabh
AU  - Joshi, Navin.C.
TI  - Problem solving assessment (PSA): (for class xi) 
SN  - 9789325982420
U1  - 153.430287 
PY  - 2014///
CY  - Noida
PB  - Vikas Publishing House
ER  -