(3GdJGejf ef GdeSFhdjI (B: s (3OQGSI aj YbO Gdfbd GdHQj (B/ s - (3GdeMGej, SYO hGUa, s ((3GdbGgQI, eUQ (B: s (3LGeYI GdbGgQI, cdjI GdMbhb (B958.s, 1958)
(3GdGUd QSGdI LGeYjI (B((3OcJhQGg(B) - (3LGeYI GdbGgQI, cdjI GdbGfhf, (B1958.s
(3jJVef GQLGYGJ HHdjhLQGajI (B: (3UaMI (B519-524.s
Keywords: (3GdJCejfs -- (3bhGfjf hJTQjYGJs -- (3eUQ(B.s; (3GdYbhO (B((3bGfhf eOfj(B)s -- (3eUQ(B.s; (3GdeSFhdjI GdeOfjIs -- (3eUQ(B.s; (3Gdfbd GdHQjs -- (3bhGfjf hJTQjYGJs -- (3eUQ(B.s; (3YbhO GdJCejfs -- (3eUQ(B.s