(3GSS GdHfGA GdGLJeGYi(B: (3OQGSI hXjaI JcGedjI ddfXe GdGLJeGYjI (B/ s - (3bHGQi GSeGYjds ([S.N] : (3efTGI GdeYGQa GdGSdGejI , s, 1989)
Keywords: (3GdGLJeGYs