(3eMGVQGJ Yf GdfXQjI GdYGeI ddLQjeI aj bGfhf GdYbhHGJ GdShQj (B/s - (3YOfGf GdNWjHs ((3GdbGgQI (B:s (3eYgO GdOQGSGJ GdYQHjI GdYGdjI ,s, 1957)
. 324-320(3HHdjhLQGajG(B: (3UaMGJ(B.s
(3jTJed Ydi EQLGYGJ HHdjhLQGajIs
Keywords: (3bGfhf GdYbhHGJs -- (3ShQjGs; (3GdLRGA GdLfGFjs