found: Beethoven, L. van. Messe C-dur, op. 86 [SR] 1970:labels (Horst R. Laubenthal) container (tenor)
found: Beethoven, L. van. Fidelio [SR] c1981:container (Horst Laubenthal)
found: Schubert, F. Terzette [SR] p1973:labels (Horst Laubenthal, tenor) container (Horst R. Laubenthal, tenor)
found: New Grove dict. of opera(Laubenthal (Neumann), Horst (Rüdiger); b. Mar. 8, 1939, Eisfeld, Thuringia; German tenor; studied with Rudolf Laubenthal, whose name he adopted for professional purposes)
found: Int. ww in mus., 14th ed.(Laubenthal, Horst; b. Mar. 8, 1939, Duderstadt, Germany; tenor)
found: Information from 678 converted Dec. 17, 2014(tenor)