बे बिखान्थिखौ थांनाय 60 बोसोरफोरनिबो सिगाङाव अराय-सम फारिखान्थियाव सोनारनानै बायदि-रोखोम बाहागो-रान्नायफोरजों सोलायबाय।
This system has been replaced over the last 60 years by multivariable classifications based on ever more data.