(3JGQjN HjJ GdebOS (B/ s - (3eMeO Rjfge eMeO YRHs; (3GHf GdLhRi (B: (3GHhGdaQL LeGd GdOjf YHOGdQMef Hf Ydi Hf eMeO Hf Ydi GdbQTi GdHZOGOis ((3GdbGgQI (B: s (3ecJHI GdKbGaI GdOjfjI , s, 1989)
Keywords: (3GdGSdGes; (3GdGSdGe hGdYdes; (3GdGSdGe hGdbVGAs; (3GdGSdGe hMQcGJ GdGUdGM hGdJLOjs