Louis Toft . <br/><br/>
Practical mathematics :  decimals, ratios, proportions, and percents / 
Louis Toft . 
 - 2nd 
 - Menlo Park, Calif. :  Cummings Pub. Co.,  [1942] 
 - vii, 504 p. :  ill. ;  24 cm. 
<br/><br/>
<br/><br/><label>ISBN: </label>084656713X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Arithmetic.<br/>MCE
<br/><br/><label>Dewey Class. No.: </label>510.2462  / TOF