(3GdOhdI hOhQgG ai GdfTGW GdGbJUGOi ai GdhWf GdYQHi (B( (3HMhK hefGbTGJ fOhI YbOJ HGdchjJ ai GdaJQI (B27 - 29 (3eGjh (B1989 / s - (3Ydi fUGQs; (3GHQGgje SYOGdOjfs; (3YHOGdaJGM GdYehUis; (3GMeO RGjOs ((3HjQhJ (B: s (3OGQ GdQGRi ddWHGYI hGdfTQ , s, 1991)
Keywords: (3GdGbJUGOs; (3GdJNWjW GdGbJUGOis; (3GdhWf GdYQHis