(3JGQjN GdNdaGA (B/ s - (3GdSjhWi (B: (3LdGd GdOjf GHhGdaVd YHOGdQMef Hf GHi HcQ Hf eMeO GdNVjQis; (3eMeO eMi GdOjf YHOGdMejOs ((3HjQhJ (B: s (3GdecJHI GdYUQjI ddfTQ hGdJhRjY , s, 1989)
Keywords: (3GdJGQjN GdGSdGeis; (3Gdedhc hGdMcGes; (3GdNdaGAs; (3GdNdaGA GdQGTOhfs