(3EbJUGOjGJ GdfbhO h GdeUGQa (B/ s - (3GdCQHGM, UGdM GdCejfs ((3WQGHdS (B( (3djHjG (B) :s (3cdjI GdeMGSHI ZQjGf,s, 1991)
Keywords: (3GdfbhOs; (3djHjGs; (3GdHfhcs