00253nam a2200109Ia 4500008004000000082001600040100002000056245001600076260002800092300000800120650001500128210210b1978   xxu||||| |||| 00| 0 eng d  a330.15 SILE  aSILK (Leonard).  aEconomists.  aNYbA Discus bookc1978  a276  aEconomists