Mathematics of investment 
Hart, William L. 
 - fifth edition. 
 -  D. C. Health and Company.  1980 
 - xiii, [152] pages. 
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<br/><br/><label>ISBN: </label>9-71081177-0 
<br/><br/><label>Dewey Class. No.: </label>510.32 H25m 1980