@book{Helbling+2022,
url = {https://doi.org/10.3790/9783428419463},
title = {Der Mensch im Bild der Geschichte},
title = {},
author = {Hanno Helbling},
publisher = {Duncker & Humblot},
address = {},
doi = {doi:10.3790/9783428419463},
isbn = {9783428419463},
year = {1969},
lastchecked = {2022}
}