@book{Mahlberg+2019,
url = {https://doi.org/10.3790/9783428464111},
title = {Gefahrenabwehr durch gewerbliche Sicherheitsunternehmen},
title = {},
author = {Lothar Mahlberg},
publisher = {Duncker & Humblot},
address = {},
doi = {doi:10.3790/9783428464111},
isbn = {9783428464111},
year = {1988},
lastchecked = {2019}
}