RT Article T1 The shadow economy in Frankfurt-Bornheim: results of an empirical study JF The informal economy: threat and opportunity in the city SP 323 OP 397 A1 Smettan, Jürgen Rüdiger 1957- LA English YR 2003 UL https://krimdok.uni-tuebingen.de/Record/1897207247 NO Literaturverzeichnis: Seite 396-397