(3GdEWGQ GdJTQjYj ddfTGW GdEYdGej (B/s - (3YHO GdSdGe, LYaQ(B.s ([(3GdbGgQI(B] :s (3OGQ GdefGQ ddWHY hGdfTQ hGdJhRjY,s, 1993)
(3HHdjhLQGajI (B: (3U(B. 377-380.s
Keywords: (3GdEYdGes -- (3bhGfjf hJTQjYGJs -- (3eUQs