(3JGQjN GdaQb GdGSdGejI hfTGI Yde GdcdGe YfO GdeSdejf (B/ s - (3GdZQGHj, Ydj eUWai, s ([(3GdbGgQI, eUQ(B] : s (3ecJHI heWHYI eMeO Ydj UHjM hGhdGOg, s, 1959)
(3jJVef edGMb(B.s
(3jJVef GQLGYGJ HHdjhLQGajI(B.s
Keywords: (3GdaQb GdGSdGejI(B.s; (3Yde GdcdGe(B.s