The National Archives (UK) list of accessions to repositories related to publishing by year: 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007.

Historical Records on Canadian Publishing:  Highlights archival documents relating to Canadian publishing history, including letters, manuscripts, photographs, diaries, artwork, interviews, and financial records in collections at McMaster University Library, Queen’s University Archives, and the Thomas Fisher Rare Book Library at the University of Toronto. 

Canadian Publishers' Records Database: Records of publishing companies, authors, editors and organizations before 1995 relating to the history of secular English-language book publishing in Canada.

Publishers' Archives: Albinski List (19th & 20th c., US): An extensive list of the location of archives for U.S. publishers and periodicals.

British Book Trade Archives (1830-1939): An extensive list of the known locations of the archives of British publishers, printers, booksellers and stationers active in the period 1830-1939.