@book{Frenz+2019,
url = {https://doi.org/10.3790/9783428512614},
title = {Freiwillige Gefahrenprävention},
title = {},
author = {Walter Frenz},
publisher = {Duncker & Humblot},
address = {},
doi = {doi:10.3790/9783428512614},
isbn = {9783428512614},
year = {2003},
lastchecked = {2019}
}