John H Twachtman Artworks And Fine Art At Arthistorynet.com http//www.988.com/artists/twaan_john_h..htm.php http//sheldon.unl. edu/html/ARTIST/Twachtman_J/SSI.html http//www.thecityreview.com/s00amps.htm. http://www.absolutearts.com/masters/t/twachtman-john_h.html