Wow. The fucking US census has better race categories than that. There are pretty standardized forms, in the US, for collecting data on race and ethnicity. Multi-racial has been an option on the US Census since 2000 and you can easily find that information on the census website (http://www.census.gov/population/www/socdemo/race/racefactcb.html) or by talking to a Government Documents librarian (BU has one (http://www.bu.edu/library/guides/govdocs/index.html))

Nothing is quite as othering as literally having to select "I am OTHER" on a survey.