Berliner Handelsgesellschaft Records. Bundesarchiv, Berlin-Lichterfelde, BArch R 8127.

"Brach’s", Farley’s & Sathers Candy Company.

Brune-Randall Family Papers, 1782-1972, MS 2004. Maryland Historical Society, Baltimore, MD. Finding aid.

Carl Laemmle Collection. Seaver Center for Western History Research, Natural History Museum, Los Angeles, CA.

Charles Best, Jr. Papers (1874-1917). Wisconsin Historical Society.

Charles F. Chandler Papers. Boxes 104 and 105, Rare Book and Manuscript Library, Columbia University. Finding aid.

Charlotte Cramer Sachs collection, AR 11603. Leo Baeck Institute, Center for Jewish History.

Charlotte Cramer Sachs papers, 1905-2002. Archives Center, National Museum of American History, Smithsonian. Finding aid.

Chicago Sinai Congregation Papers. American Jewish Archives, Cincinnati, OH. Finding aid.

Christian Heurich Brewing Company Records, 1883-1909. Smithsonian Institution, National Museum of American History, Washington, DC. Online catalog.

Christian Heurich collection, 1844-2001. Historical Society of Washington, DC. Finding aid.

Columbia Pictures records, 1929-1974. Collection Number 09355, American Heritage Center, University of Wyoming. Finding aid.

Cone Mills Corporation Records, 1858-1997. Collection Number 5247, the Southern Historical Collection, the Louis Round Wilson Special Collections Library, University of North Carolina at Chapel Hill. Finding aid.

Container Corporation of America Collection. Special Collections, Richard J. Daley Library, University of Illinois at Chicago. Finding aid.

Corporate Archives. Guardian Life Insurance Company, New York, N.Y..

Corporate Archives Carl Zeiss. Jena, Germany. Digital collections.

Curt Teich Postcard Archive. Lake County Discovery Museum, Wauconda, Ill. Finding aid.

Data Relating to the History of the Firm of H. Hackfeld & Co., Limited. Manuscript H00055, C. Kasten, compiler. Hawaiian Rare Manuscript Collection, University of Hawaii at Manoa. Finding aid.

Downs Collection, 1892-1946. Schenectady Museum Archive, Schenectady, NY . Finding aid.

Edward A. Filene Papers. Credit Union National Archives (CUNA), Madison, Wisconsin.