This collection contains the personal and professional papers of Marxist scholar and editor Herbert Joseph Putz written under the pseudonym Erik Bert.

Correspondence, manuscripts, documents, lists, and subject files of the Mexican Communist Party (Partido Comunista Mexicano) from the 1950s. Included are organizational records of the national party as well as many local groups, and folders on a great range of topics including workers in the petroleum industry, teachers, relations with other national communist parties, finances, front groups, factionalism within the party, party conferences, party history, and biographical data.

The V. K. Wellington Koo papers document the diplomatic legacy of Wellington Koo as a Chinese statesman and diplomat of the 20th Century. The papers primarily consist of materials collected during Koo's diplomatic career, relating to the Lytton Commission, 1932-1933; the League of Nations, 1931-1940; the United Nations, 1944-1946; his ambassadorships to France, 1932-1941; to Britain, 1941-1946; to the United States, 1946-1956; as the Senior Advisor to the Republic of China from 1956; and as the Judge on the International Court of Justice, 1957-1966. The materials include correspondence, diaries, memoranda, manuscripts, documents, notes, speeches, maps, photographs, printed material, and audio visual material. The bulk of the materials emphasizes China's domestic and foreign affairs, such as the Sino-Japanese conflict, World War II and the Cold War in the Far East region, as well as the League of Nations and the United Nations.