(3GdGOH hGdeYQcI (B/s - (3GJMGO GdcJGH RGdUMajjf GdadSWjfjjf s ((3HjQhJ (B:s (3GdeDSSI GdYQHjI ddOQGSGJ hGdfTQ ,s, 1974)
Keywords: (3GdGOHs