(3UjGfI GdQGOjh GdJQGfRjSJhQ (B/ s - (3Si(B. (3dGHjRs; (3GMeO ceGd YhGOs; (3UdGM YGeQs ([S.N] : (3aQfcdjf ddWHGYI , s, 1990)
Keywords: (3GdUjGfIs; (3GdQGOjhs