Source: Data source is coming from Accessing Online on the website of City of Boston.gov: link
Explanation: AA. here means African American. The census tract of Mission hill neighborhood is larger than the defination area of Mission Hill neighborhood. Click here to see the difference.
Source: Data source is coming from Analyze Boston: Boston Neighborhood Demographics Summary: link
Source: Data source is coming from #Missionhill100 projoct on the website of The Scope: link