Bertali (Bartali), Antonio
Canzon [or Sonata] | A 3. 2 Violin è Viola [di Gamba] and basso continuo
D-W, Cod. Guelf. 34.7 Aug.2° (Jakob Ludwig Partitur Buch), pp. 93-96, n° 56
The title is Canzon in the score, but Sonata in the corresponding index entry (p. 273).
The full instrumental indication Viol di gamba is not found in the title of the piece, but rather in the index.
Michael Fuerst, The Partiturbuch Ludwig: An Introduction and Thematic Catalogue, «The Viola da Gamba Society Journal», 4 (2010), pp. 74-102. http://vdgs.org.uk/journal/Vol-04.pdf