American Letters-Rediscovering Tolstoy: American Senators, Ambassadors, Presidential Candidates, Journalists & Writers in Correspondence with Tolstoy 1884-1910
Books can be attributed to "Unknown" when the author or editor (as applicable) is not known and cannot be discovered. If at all possible, list at least one actual author or editor for a book instead of using "Unknown".
Books whose authorship is purposefully withheld should be attributed instead to Anonymous.