@book{2025,
url = {https://doi.org/10.3790/9783428443871},
title = {Polen heute},
title = {},
author = {},
publisher = {Duncker & Humblot},
address = {},
doi = {doi:10.3790/9783428443871},
isbn = {9783428443871},
year = {1979},
lastchecked = {2025}
}