00370pab a2200121 454500008004000000100002400040245010000064260000900164300001100173362000900184650001000193773004500203180718b1988   xxu||||| |||| 00| 0 eng d  aEl - Erian, Mohamed  aCurrency substitution in Egypt and the Yeman Arab RepublicbA comparative quantitative analysis  c1988  a85-103  aMar.  aMoney  aInternational Monetary Fund Staff Papers