(3eYLe GdeUWdMGJ GdRQGYjI (B: s (3EfLdjRj (B- (3YQHj (B/ s - (3MfG, LhQL HGSjdjs; (3YKeGf, eMeO GdTGPdjs ((3WQGHdS(B((3djHjG(B) :s (3LGeYI GdaGJM,s, 1977)
Keywords: (3GdRQGYIs; (3GdbhGejSs; (3GdeUWdMGJs