"A listing of over 5000 websites describing holdings of manuscripts, archives, rare books, historical photographs, and other primary sources for the research scholar." Organized geographically:

• Western United States and Canada
• Eastern United States and Canada: States and Provinces A-M
• Eastern United States and Canada: States and Provinces N-Z
• Latin America and the Caribbean
• Europe A-M
• Europe N-Z
• Asia and the Pacific
• Africa and the Near East
• Additional Lists