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Johann Petrák
Jan
Petrák, Johann (?-c.1871). Czech composer active in Braila in Romania. Entrant and prize-winner in competition sponsored by Prague publisher Hoffmann for best dance compositions, 1858. Popular composition Sedlčanská Polka was published in Prague in 1850, a year later his Waltzes for piano Zvuky Labské were published by Jan Hoffmann.