(3bdYI GdMUf(B: (3MUf GdGcQGO (B/ s - (3eUWai WdGSs; (3eMeO hdjO GdLdGOs ([S.N] : (3WdGS ddOQGSGJ hGdJQLeI hGdfTQ , s, 1990)
Keywords: (3ShQjGs; (3GdLZQGajGs; (3GdGcQGOs; (3GdGKGQ GdTQbjIs; (3bdYI GdMUfs