Humplrey, David B. <br/><br/>
Payment systems   : principles, practice, and improvements 
/ David B. Humphrey 
 - Washington, D.C.   : The World Bank 
 - 104p. 
 - World Bank Technical paper   ; 260 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sistemas de pagos.