(3gj Ce GdehJ (B: s (3TYQ (B/ s - (3Ybd, YHO GddWjas ((3YeGf (B:s (3eQcR Zfje ddJUeje,s, 1989)
Keywords: (3GdTYQ GdYQHjs; (3GdYUQ GdMOjKs; (3adSWjfs