The Gilberto and Minerva Martinez Papers (1971-1997) contain materials related to Gilberto Martinez's life and political activism in Michigan and Texas. Included are files, photographs, illustrations, newspaper clippings, articles, realia and memorabilia focused on artists, exhibits, political events, political parties - such as La Raza Unida - and business ventures in broadcasting and communications. Of particular note is the history of the flags in Series 5. These flags were those flown over the Zavala County Courthouse on the eve of the La Raza Unida Party (LRUP) defeating the incumbents. The Texas flag was later loaned out for use in Chicano civil rights marches as far north as Wisconsin.