"1900 - 1999" . . . . "Sources"@en . . . . "Speaking out activism and protest in the 1960s and 1970s"@en . . . "History"@en . . "History" . "Speaking out : activism and protest in the 1960s and 1970s" . . . . "Speaking out : activism and protest in the 1960's and 1970's" . . . . . . . . . "Sources" . "United States" . .