(3GdGhGeQ GdeQcHI hGdNUGFU GdGVGajI dHQfGeL dhJS (B1 2 3 (3W(B1 / s - (3MSjf MSf HQcGJs ([S.N] : (3eDSSI LeGd GdLGSe ddGdcJQhfjGJ , s, 1990)
Keywords: (3GddhJSs; (3HQGeL GdMGSHGJ GdGdcJQhfjIs