(3af GdbQGAI h GdJdNjU (B: s (3QDjI h OQGSI h eNJGQGJ (B/ s - (3GdghGd, MGeOs; (3GdUjaj, ESeGYjds ((3GdchjJ (B:s (3ecJHI GdadGM,s, 1981)
Keywords: (3GddZI GdYQHjIs; (3GdbQGAIs