(3GdfNHI hGdeLJeY (B.s - (3HhJh ehQ , J (B. (3Hs ((3HjQhJ (B:s (3GdeDSSI GdYQHjI ddOQGSGJ hGdfTQ ,s, 1972)
Keywords: (3GdYdGbGJ GdGLJeGYjI (B.s