(3NeSI GUhGJ (B: (3QhGjI (B, (3W(B2 / s - (3ZGFH WYeI aQeGfs ([S.N] : (3TQcI cGXe ddfTQ hGdJQLeI hGdJhRjY , s, 1985)
Keywords: (3GdbUU GdYQHjIs; (3GdbUU GdGLJeGYjIs; (3GdbUU GdYQHjI GdeJQLeIs