(3fchf Ch dG fchfs - (3GdYWGQ, fLGMs ((3hRQGI GdKbGaI h GdEQTGO Gdbhejs (3OeTbs, 1981)
Keywords: (3GdYdhe GdSjGSjIs; (3GdeMGVQGJs; (3GdebGdGJs