@book{Haas+2019,
url = {https://doi.org/10.3790/9783886405152},
title = {Best Practice Beschaffungsmanagement},
title = {},
author = {Gerd Haas},
publisher = {Deutscher Betriebswirte-Verlag},
address = {},
doi = {doi:10.3790/9783886405152},
isbn = {9783886405152},
year = {2005},
lastchecked = {2019}
}