(3GdJYHjQ GdGLJeGYi YfO eGdc Hf fHi(B: (3efXhQ JQHhi dbVGjG GdJZjjQ ai GdeLJeY GdeSd GdeYGUQ (B/ s - (3Ydi GdbQjTs ([S.N] : (3GdRgQGA ddGYdGe GdYQHi , s, 1989)
Keywords: (3GdGSdGe hGdeLJeYs; (3GdGSdGe hGdGUdGM GdGLJeGYis; (3GdGSdGe hGdGUdGM GdSjGSis; (3GdGUdGM GdGLJeGYis; (3GdeUdMhf GdGLJeGYjhfs