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Gesina Liedmeier; Michael Latcham, 'Two bass viols labelled John Roos at the Gemeentemuseum, The Hague', The Galpin Society Journal 62, (Apr., 2009), p. 167-181, 198-199: 174, 176, afb. 13
René Vannes, Giovanni Iviglia, Ernest Closson, Émile Français, 'Dictionnaire universel des luthiers. Tome premier', Bruxelles: Amis de la musique, 1988, p. 306