. . . . "Six sonatas for two violins with a bass for the harpsicord or violoncello" . . . "Six sonata's for two violins with a thorough bass for the harpshichord or violoncello" . "Six sonatas for two violins with bass for the harpsichord or violoncello" . . . "Six Sonatas for Two Violins with a Bass for the Harpsicord or Violoncello. [Parts.]" . . "Six sonata's for two violins with a thorough bass for the harpsichord or violoncello" . . . . . . . "Six sonatas or notturnas for two violins and bass" . .