The Rijksmuseum | Documentation “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, afb. 1-2, 4, 6, 8, 12, 14-15, 17”