(3GHQGgje GHh GdGfHjGAs - (3GHQGgje ,GdNdjds ((3HjQhJs (3,OGQ GdcJGH GddHfGfj s, 1967)
Keywords: (3YHGS eMehO GdYbGOs; 1.(3GHQGgje (B2.(3GdYbGO ,YHGS eMehO (B3.(3GdYfhGfs