@book{2018,
url = {https://doi.org/10.3790/9783428469529},
title = {40 Jahre innerdeutsche Beziehungen},
title = {(Jahrbuch 1989)},
author = {},
publisher = {Duncker & Humblot},
address = {},
doi = {doi:10.3790/9783428469529},
isbn = {9783428469529},
year = {1990},
lastchecked = {2018}
}