(3Hfh NWGH Hf YHOGdLHGQ GdJOejQi (B: (3GSQI ef GdehdOjf HeQSjg ai GdYUQ GdGSdGei (B/ s - (3SMQ GdSjO YHOGdYRjR SGdes ([S.N] : (3eDSSI THGH GdLGeYI , s, 1989)