Günter Grass, Heinz Oskar Vetter, and Dieter Lattmann

Author Günter Grass (l-r), head of Confederation of German Trade Unions (DGB) Heinz Oskar Vetter, and chairman of the German Authors' Union (VS) Dieter Lattmann on 4 February 1970 in Dusseldorf. The DGB and VS agreed on a close organizational cooperation on a sociopolitical level.