found: His Zwei Quintette für Flöte, Oboë, Clarinette, Horn und Fagott op. 11, 18--?:t.p. (Joh. Sobeck)
found: LC data base, 6-21-90(hdg.: Sobeck, Joh.)
found: His Duo concertant mit Benutzung eines Motifs aus Mozarts Don Juan, 188-?:cover (Johann Sobeck)
found: Macmillan enc. of mus.(Sobeck, Johann; b. 4/30/1831, Luditz; d. 6/9/14, Hanover; Bohemian clarinettist and composer)
found: His Quintet in F, op. 9, for flute, oboe, clarinet, horn, and bassoon, 1992?:t.p. (J. Sobeck; 1831-1914) pref. (Jan Sobeck)