The Soviet Invasion of Czechoslovakia: August 1968

Translation: "Comrades, let bygones be bygones ..."
(A June 1968 cover from the satirical magazine Dikobraz ("Porcupine"), referring to the growing public discussion of the political persecution (and executions) of the 1950's.) Found in Political Cartoons.

The Soviet Invasion of Czechoslovakia: August 1968 (Materials from the Labadie Collection of Social Protest Material)
Posters & Pamphlets and Newspapers and other Publications . (via PLEP)