Columbia subject headings:
Kent State Shootings, Kent, Ohio, 1970.
Harvard subject headings:
Kent State Shootings, Kent, Ohio, 1970
Kent State University--Riot, 1970 (May 4)
Kent State University--Riot, 1970.
Kent State University--Riot, May 4, 1970.
Vietnam War, 1961-1975--Protest movements--United States
Princeton subject headings:
Kent State Shootings, Kent, Ohio, 1970.