(3VQHjI GdJQcGJ aj eUQ (B/s - (3MSjf NdGa s ((3GdLjRI (B: s (3eWHYI LGeYI GdbGgQI ,s, 1957)
(3jTJed Ydi EQLGYGJ HHdjhLQGajI(B.s
(3GdfU HGddZI GdYQHjIs
Keywords: (3GdVQGFH(B.s; (3GdedjI GdYGeI hGdJTQjY GdVQjHjs