(3NQGFW GdJhRjYGJ GdLZQGajI (B: (3OQGSI ai WQb GdJeKjd GdcQJhLQGai (B/ s - (3eMeO eMeO SWjMIs ((3GdbGgQI (B: s (3OGQ GdfgVI GdYQHjI , s, 1972)
Keywords: (3GdNQGFW GdWHhZQGajIs; (3QSe GdNQGFWs; (3GdNQGFW(B, (3Ydes; (3GdcQJhLQGajGs