(3GeKGd GdbQBf (B/ s - (3GHf bje GdLhRjI , GHj YHO Gddg eMeO Hf GHj HcQ s; (3GdYdjdj , ehSi HfGj YdhGf s ((3HZOGO (B: s (3eWHYI GdReGf , s, 1987)
Keywords: (3GdbQBf , GeKGd s