@book{Maas+2025,
url = {https://doi.org/10.3790/9783428409631},
title = {Probleme der Sozialgeographie},
title = {},
author = {Walther Maas},
publisher = {Duncker & Humblot},
address = {},
doi = {doi:10.3790/9783428409631},
isbn = {9783428409631},
year = {1961},
lastchecked = {2025}
}