Find the citation please. I'm not even sure what you mean by generally accepted racial groups. In the UK, unlike the US, you would probably distinguish between

Find the citation please. I'm not even sure what you mean by generally accepted racial groups. In the UK, unlike the US, you would probably distinguish between Indian & Pakistani vs. all other Asians. You might also distinguish Irish as a separate ethnicity and probably would not think of Arabs or Turks as white. This stuff is very culturally dependent and I don't know which set of "racial groups" would be considered canonical.