(3JOejQ GdeLJeY chSjdI (B/ s - (3di(B0 (3L(B0 (3cGQis ([S.N] : (3GdOGQ GdYQHjI ddYdhe , s, 1990)
Keywords: (3GdOQGSGJ GdGLJeGYjIs; (3GdHMhK GdGLJeGYjIs; (3JfejI GdeLJeYs