00386nam a2200133 a 450000500170000000800410001710000200005824500770007825000120015526000450016730000150021265000140022785200110024120190520020608.0080128s19uu    xx            00    eng d10aByrns, Ralph T.10aStudent guide to learning economics /cRalph T. Byrnes, Gerald W. Stone.  a3rd ed.0 aGlenview, IL :bScott, Foresman,cc1987.  avi, 486 p.  aEconomics  7OLOPSC