http://www.goodreads.com/author/show/1373374.Robert_Welles_Ritchie https://catalog.hathitrust.org/Search/Home?lookfor=%22Ritchie,%20Robert%20Welles,%201879-1942.%22&type=author&inst= https://harpers.org/author/robertwellesritchie/
via Google —Akme 12:55, 9 July 2016 (UTC)
