(3agGQS dSGf GdYQH (B/s - (3YeGjQI, Ndjd CMeOs; (3GHf efXhQ, eMeO Hf ecQe Hf Ydj,s 630-711 (3gLQjG(B.s ((3HjQhJ (B:s (3eDSSI GdQSGdI,s, 1987)
Keywords: (3GddZI GdYQHjIs -- (3eYGLes -- (3cTGaGJs