found: Federal Music Society. Music of the Federal Era [SR] 1978:label (Franz Kotzwara)
found: New Grove(Kocžwara, František (Franz; Kotzwara, Francis) (b. ?Prague, c.1750; d. London, 9/2/1791), Bohemian instrumentalist and composer)
found: Baker, 7th ed.(Kotzwara (recte Kočvara), Franz, Bohemian composer, b. Prague, 1730; d. London, 9/2/1791)
found: LC data base, 3/15/85(hdg.: Kocžwara, Franz, d. 1791) LC manual auth. cd. (usage: Francis Kotzwara; variant: Franz Kotzwara; Franz Kocžwara)
found: Wikipedia, December 2, 2015(Frantisek Kotzwara; František Kočvara, known later in England as Frantisek Kotzwara; born 1730 (some sources give Kotzwara's year of birth as 1750 or 1740), Prague, Bohemia, died September 2, 1791 (some sources give Kotzwara's year of death as 1793), London; Czech violist, double bassist, and composer)