TY  - BOOK
AU  - PATWARDHAN,  K.S. JOSHI,  S.P. AND MHATRE,  R.
TI  - ELEMENTS OF COMMERCIAL ARITHMETIC. 
U1  - 511.8 PAT/ELE 
PY  - 1972///
CY  - ALLAHABAD 2ND ED.
PB  -  KITAB MAHAL
ER  -