found: Pies, N.J. Zur Geschichte von Kloster Maria Engelport, c1989:v. 1, 3, t.p. (Ortes Treis-Karden)
found: Brockh. Enzykl., 1973:v. 18, p. 835, v. 9, p. 753 (Treis-Karden; community in Rheinland-Pfalz formed in 1969 by the merger of the localities of Treis and Karden)
found: WIBO-Werbung. Burgen-, Wein- und Ferienland, Treis-Karden, Mosel, Eifel, Hunsrück, 2000?
found: GEOnet, December 20, 2006(Treis-Karden, ppl, 50°11ʹN 7°18ʹE, Rheinland-Pfalz)
notfound: BGN gaz. 07-02-90 (Treis: popl.; 50°11ʹN, 7°18ʹE; Karden: popl.; 50°11ʹN, 7°18ʹE)