@book{Mayer+2023,
url = {https://doi.org/10.3790/9783428409921},
title = {Das Opportunitätsprinzip in der Verwaltung},
title = {},
author = {Franz Mayer},
publisher = {Duncker & Humblot},
address = {},
doi = {doi:10.3790/9783428409921},
isbn = {9783428409921},
year = {1963},
lastchecked = {2023}
}