Correspondence, speeches and writings, reports, notes, newsletters, clippings, photographs, tape recordings, motion picture film, and printed matter, relating to communism in Eastern Europe and Poland, agriculture in Poland, Polish politics, especially during World War II, Polish-Soviet relations, the International Peasant Union, the Polskie Stronnictwo Ludowe, and Polish émigré politics.

Mikołajczyk was Polish politician; prime minister, Government-in-Exile (London), 1943-1944; second vice premier and minister of agriculture, 1945-1947; president, International Peasant Union, 1948-1964.

A digital copy of this entire collection is available on the Polish National Digital Archives website at Dokumenty Stanisława Mikołajczyka.