(3eMfI GdGSdGe ai GfOhfjSjG (B/ s - (3eMeO jMji (B((3ebOe(B)s; (3GSeGYjd UGObs ([S.N] : (3GdRgQGA ddGYdGe GdYQHi , s, 1989)
Keywords: (3GfOhfjSjG JGQjN GdYUQ GdGSdGeis; (3GdGSdGe ai GfOhfjSjGs