Aufmann, Richard N. <br/><br/>
Introductory algebra :  an applied approach / 
Richard N. Aufmann ; Vernon C. Barker 
 - 4th ed. 
 - Boston :  Houghton Mifflin Co.,  1995. 
 - 486, 83, 5, 5p. :  ill. (some col.) ;  28cm