(3GdMd GdGhMO (B/ s - (3GdQcGHj, aDGO, s ((3GdbGgQI (B[(3eUQ(B] : s (3GdTQcI GdYQHjI ddWHGYI hGdfTQ, s, 1963)
Keywords: (3GdYQGbs -- (3SjGSI hMcheIs -- (3GdbQf (B20.s; (3GdYQGbs -- (3JGQjNs -- (3GdbQf (B20.s