@book{mangold_90_2021, address = {Bergisch Gladbach}, title = {90 km {Kleiner} {Grenzverkehr} {Roermond}/{Cologne}. "Übergang"}, volume = {2}, isbn = {978-3-9812321-6-5}, language = {German}, publisher = {CASA Immobilienberatung GmbH}, author = {Mangold, Susanne E}, year = {2021}, note = {Inhaltsverzeichnis: https://d-nb.info/1228566054/04}, keywords = {Grenzgebiet, Grenzverkehr, Köln, Roermond}, } @book{mangold_90_2020, address = {Bergisch Gladbach}, title = {90 km {Kleiner} {Grenzverkehr} {Roermond}/{Cologne}}, volume = {1}, isbn = {978-3-9812321-7-2}, language = {German}, publisher = {CASA Immobilienberatung GmbH}, author = {Mangold, Susanne E}, year = {2020}, note = {Inhaltsverzeichnis: https://d-nb.info/1225947413/04}, keywords = {Grenzgebiet, Grenzverkehr, Köln, Roermond}, }