(3SjGSI GdTYQ (B: s (3OQGSGJ aj GdTYQjI GdYQHjI GdeYGUQI (B/ s - (3COhfjS, s ((3HjQhJ (B:s (3OGQ GdBOGH,s, 1985)
Keywords: (3GdTYQ GdYQHjs; (3GdYUQ GdMOjKs; (3GdJGQjN GdCOHjs; (3GdfbO GdCOHjs