You can use historical newspapers to find out how issues and events were reported during a specific time in history.
Alternative Press Index. 1969- . Index to journals, magazines, and newspapers offering an alternative, radical, or left perspective. Online beginning with 1991. Available?
From Radical Left to Extreme Right: A Bibliography of Current Periodicals of Protest, Controversy, Advocacy, or Dissent. 3 vols. 2d ed. Robert H. Muller. Ann Arbor, Campus Publishers, 1970-1976. Available?
Censorship of the Alternative Press: A Descriptive Study of the Social and Political Control of Radical Periodicals (1964-1973). Ruth Marie Eshenaur. Thesis, Southern Illinois University, 1975. Available?