Humphrey, David B <br/><br/>
Payment systems: principles;  practice, and improvements/ 
David B Humphrey. 
 - Washington, D C;  World Bank,  1995. 
 - 104p;  ill. 
<br/><br/><label>ISBN: </label>0821331116 
<br/><br/><label>Dewey Class. No.: </label>332.1  / HUM.N5