(3JfGSb GdOQQ aj JfGSH GdShQ (B/s - (3GdLdGd GdSjhWj, YHO GdQMef Hf CHj HcQ Hf eMeO,s 849-911 (3gLQjG(B.s; (3GdOQhjT, YHO Gddg eMeOs ((3HjQhJ (B:s (3YGde GdcJH ddWHGYI hGdfTQ,s, 1987)
Keywords: (3GdbQBfs -- (3ShQ hBjGJs