00308nam a2200121 a 450000500170000008200160001710000190003324500450005225000080009726000340010530000270013963000200016620251202164304.0  a330.01bHAL  aHalm,George N.  aEconomic systemsba comparative analysis  a3rd  aNew DelhibOxford & IBHc1970  axi, 420 p.b22 cm.cHB  aEconomic system