Washington State University
Washington State University: American Authors: Bibliography on "Rip Van Winkle"
This site provides an extensive bibliography of works by and about "Rip Van Winkle" and the author Washington Irving. Good site for finding resources.
Blackdog Media
Classic Reader: Authors: Washington Irving
This site features the author Washington Irving including a biography and the full text of the novel Old Christmas and three short stories: "The Legend of Sleepy Hollow", "Little Britain", and "Rip Van Winkle".