PATWARDHAN,  K.S. JOSHI,  S.P. AND MHATRE,  R.S. <br/><br/>
ELEMENTS OF COMMERCIAL ARITHMETIC.  

 - ALLAHABAD 2ND ED.   KITAB MAHAL  1972 
<br/><br/><label>Dewey Class. No.: </label>511.8 PAT/ELE