$a Die Dreigroschenoper [Dokument dźwiękowy] = The threepenny opera = L'Opera de quat'sous : Berlin 1930 : Songs and chansons. - Berlin, 1990. $b Wyk.
670
$a LCA online $b (found: Pipers Enzyk. des Musiktheaters, c1986-c1997: Register (Ponto, Erich (Johannes Bruno); b. Dec. 14, 1884, Lübeck; d. Feb. 4, 1957, Stuttgart; German actor and director))
670
$a DNB online $b (Ponto, Erich , Ponto, Erich Johannes Bruno