A couple of special collections from Boston’s WBGO OpenVault archives related to the history of people of color. Included are a 17-part coverage of the 1963 March on Washington, and Say Brother, WGBH’s longest-running public affairs television program by, for and about African Americans, now known as Basic Black, covers the years 1968 to 1982.  Examples of programming included are an interview with Bobby Seale, the death of Steve Biko, ethnic history of Puerto Rico, and racism in the feminist community.