@book{141531,
author = {DuMortier, Barthélemy Charles and
Pierre Joseph van Beneden},
title = {{Histoire naturelle des polypes composées d'eau
douce, ou des bryozoaires fluviatiles}},
publisher = {Bruxelles: Hayez},
year = 1850,
url = {https://vlp-new.ur.de/records/lit23326}
}