(3GTcGdjI GdOjebQGWjI hGdHOjd GdGSdGei ai GdhWf GdYQHi (B/ s - (3NGdO GdMSfs ([S.N] : (3OGQ GdHQGb ddfTQ , s, 1990)
Keywords: (3GdYGde GdYQHis; (3GjQGfs; (3GdOjebQGWjIs; (3GdGSdGe hGdSjGSIs; (3GdKhQI GdGjQGfjIs