Poland - The visit of U.S. President Richard Nixon sheet no) Poland - Nixon in Warsaw. Zap. Berlin - The signing of the Final Protocol quadripartite agreement on West Berlin (AA Gromyko, etc.). Germany - AA Meeting Gromyko and Willy Brandt and Walter Scheel. USSR, Poland, Germany, Zap. Berlin - Nixon's visit to Moscow and Warsaw. Ratification of treaties of Germany and the USSR and Poland. The signing of the quadripartite agreement on West Berlin. Romania - The visit of Fidel Castro. Holland - Visit AA Gromyko. The signing of the agreement on cooperation in the field of economy and technology.