(3EcJSGM GdSMQ h GdTYhPI h GdcgGfI h GdJfLje h GdVQH HGdQed (B/ s - (3GdNQha, CMeO eMehO Ndjds ((3YeGf (B:s (3OGQ GdaQbGf,s, 1990)
Keywords: (3GdESdGes; (3GdSMQ h GdJfLjes; (3GdYQGaIs