(3TQM bGfhf GdVQjHI GdYGeI Ydi GdeHjYGJ (B:s (3h Md GdeTcdGJ GdJi JKjQgG JWHjb GdbGfhf (B/ s - (3RcQjG eMeO Hjheis ((3GdbGgQI (B:s (3ecJHI GdNGdb KQhJ (B,s, 1991)
(3jTJed Ydi EVGMjGJ h LOGhd(B.s
(3GdfU HGddZI GdYQHjIs
Keywords: (3GdVQGFHs; (3GdeGdjI GdYGeI h GdJTQjY GdVQjH s