Grafton, R. Quentin. <br/><br/>
A workbook in mathematical methods for economists / 
R. Quentin Grafton and Timothy C. Sargent 
 - New York :  McGraw-Hill ,   c1997 
 - 278 p. :  ill. ;  27 cm. 
<br/><br/><label>ISBN: </label>0070071225