(3GdeSDhdjI GdeOfjI Yf GdCNWGA GdegfjI (B/ s (3GdWHjH GdegfOS GdeYeGQj hGdebGhd GdeMGej (B: s - (3GdMSjfj, YHO GddWjas ((3HjQhJ (B: s (3GdTQcI GdYGdejI ddcJGH, s, 1987)
Keywords: (3GdYGedhf Gdegfjhf(B. s; (3GdCNWGA(B. s; (3GdYWd hGdVQQ(B. s; (3GdbGfhf GdeOfj(B. s; (3GdEgeGd(B. s; (3GdJHYI GdeOfjI(B. s