(3GdMSGH(B: (3GdLRA GdKGfj(B: (3WQjbI SgdI eThbI dJYdje eHGOiA GdMSGHs ((3eUQs (3OGQ GdKbGaI (B((3GdeSjMjI(B)s, 1992)
Keywords: Natural Sciences (3GdYdhe GdHMJIs; General