(3efgL GdJQHjI GdESdGejI hCSGdjHgG aj JMbjb GdhbGjI ef GdLQjeI (B/s - (3GdLHGdj, efUhQ Hf YHO GdYRjRs; (3GdTjTGfj, YHO GdhgGH Hf YHO GdYRjR s (1989)
(3CWQhMI (B((3eGLSJjQ(B)s
(3HHdjhLQGajI (B: (3hQbI (B217-221.s
Keywords: (3GdJQHjI GdESdGejIs -- (3OQGSI hJYdjes; (3GdESdGe hGdEUdGM GdGLJeGYjs; (3ecGaMI GdLQjeIs -- (3LhGfH SdhcjI hCNdGbjIs; (3QSGdI LGeYjI (B((3eGLSJjQ(B)s