||3 Duos difficiles
|Opus/Catalogue NumberOp./Cat. No.
|I-Catalogue NumberI-Cat. No.
|Composer Time PeriodComp. Period
Possibly first published by the 1810s. Op.19, a set of 3 grands Duos concertans, was reviewed in AMZ in 1819 (and Op.20, air varié for 2 flutes, is listed as having been published in 1819 between Easter and Michaelis - AMZ October 1819 supplement.)