@book{2025,
url = {https://doi.org/10.3790/9783428466597},
title = {Handbuch der Ifo-Umfragen},
title = {Vierzig Jahre Unternehmensbefragungen des Ifo-Instituts für Wirtschaftsforschung, München},
author = {},
publisher = {Duncker & Humblot},
address = {},
doi = {doi:10.3790/9783428466597},
isbn = {9783428466597},
year = {1989},
lastchecked = {2025}
}