(3Yed Cgd GdeOjfI (B/s - (3SGde, YWjI eMeO,s 1346-1420 (3gLQjG(B.s ((3GdeOjfI GdefhQI (B:s (3ecJHI OGQ GdJQGK,s, 1989)
Keywords: (3Gdabg GdeGdcjs; (3Gdabg GdESdGejs