These are now organized as The Lars Onsager Archive at the Gunnerus Library in Trondheim.
Library of Congress | American Library Association | New York Public Library | British Library | Bodleian Library | National Library of Australia | library | Library | State Library of New South Wales | Huntington Library | Library Journal | Carnegie library | State Library of Victoria | National Library of Ireland | Boston Public Library | Newberry Library | John Rylands Library | State Library of Queensland | National Library of Wales | Modern Library | Library of Virginia | Library of America | Black Library | Widener Library | Chicago Public Library | Cambridge University Library | Royal Library | Ronald Reagan Presidential Library | Mitchell Library | San Francisco Public Library |