found: Bhattacharya-Stettler, T. Otto Nebel, c1982:t.p. (Otto Nebel) p. 9 (b. 12/25/1892; d. 9/12/1973)
found: LC data base 10-4-83(hdg.: Nebel, Otto, 1892-1973)
found: Otto Nebel, 1892-1973, c2012:t.p. (painter and poet) p. 345 (b. Dec. 25, 1892, Berlin; mason, actor, soldier, painter, writer, art teacher) p. 351 (d. Sept. 12, 1973, Bern)
found: Allgemeines Künstlerlexikon online, Jan. 18, 2013(Nebel, Otto Wilhelm Ernst; Nebel, Otto; b. Dec. 25, 1892, Berlin; d. Sept. 13, 1973, Bern; painter, graphic artist, author, actor; lived in Germany and Switzerland)
found: VIAF, Jan. 18, 2013(Nebel, Otto, 1892-1973)