@book{Ries+2020,
url = {https://doi.org/10.3790/9783428412426},
title = {Normung nach Normzahlen},
title = {},
author = {Clemens Ries},
publisher = {Duncker & Humblot},
address = {},
doi = {doi:10.3790/9783428412426},
isbn = {9783428412426},
year = {1962},
lastchecked = {2020}
}