(3GdMQcGJ GdSQjI aj GdESdGe (B: s (3QDjI YUQjI (B/ s - (3ESeGYjd , eMehO s ((3HjQhJ (B: s (3OGQ Gdbde , s, 1973)
Keywords: (3GdaQb GdESdGejI s