(3GdeQUaGhi aj bGfhf GdYbhHGJ GdNGU (B/s - (3MSf UGOb GdeQUaGhis ((3GdGScfOQjI (B:s (3efTCI GdeYGQa,s, 1975)
(3jTJed Ydi EQLGYGJ HHdjhLQGajI(B.s
Keywords: (3GdbGfhf GdLfGFis; (3bGfhf GdYbhHGJ GdbSe GdNGUs