(3GdGSJYOGO ddehJ hSDGd ddbHQ (B: s (3hJRhOh aGf NjQ GdRGO GdJbhi (B/ s - (3GdeYHQi GdedjHGQi (B: (3Rjf GdOjf Hf Ydis ((3GdbGgQI (B: s (3ecJHI GdJQGK GdGSdGei , s, 1987)
Keywords: (3GdebGHQs; (3GdehJs; (3jhe GdbjGeIs; (3GdSeYjGJs; (3GdLfI hGdfGQs