Land of Oz - Information about the theme park, which operated in the 1970s in Beech Mountain, North Carolina. - http://www.emeraldmtn.com/oz.htm
Ruth Plumly Thompson Bibliography - A listing of her books and short stories that carried on the adventures in Oz, with book covers and links to related authors. - http://www.fantasticfiction.co.uk/authors/Ruth_Plumly_Thompson.htm
Oz Books by Other Authors - Listing of Oz books by authors other than L. Frank Baum and Ruth Plumly Thompsom. - http://www.halcyon.com/piglet/books/book62.htm