(3aQbI GdfRGQjI (B: s (3JYGdjegG hQLGdgG Ydi VhA GdeQGLY GdaGQSjI (B/ s - (3GdYRGhi (B: (3GdSjO eMeOs ((3GdbGgQI (B: s (3LGeYI Yjf TeS (B:s, 1972)
(3jTJed Ydi GQLGYGJ HHdjhLQGajIs
Keywords: (3GdGSeGYjdjI GdTQbjI(B((3GdfRGQjI(B)s; (3GdGSeGYjdjI(B((3GdTjYI(B)s