(3JGQjN GdacQ GdYQHj (B/ s - (3GSeGYjd eXgQ Hf eMeO Hf YHO GdeLjO, s 1891-1962(3, s ((3HjQhJ (B[(3dHfGf(B] : s (3OGQ GdcGJH GdYQHj, s, 1960)
(3jJVef GQLGYGJ HHdjhLQGajI(B.s
Keywords: (3GdadSaI GdGSdGejI(B.s; (3GdMVGQI GdGSdGejIs -- (3JGKjQGJ jhfGfjI(B.s