@book
{TN_libero_mab2,
author = {
Thiele, Johannes
},
title = {
Handbook of systematic malacology
2 Gastropoda: Opisthobranchia and Pulmonata
},
publisher = {Fischer},
year = {1992},
address = {
Stuttgart
},
url = {
http://slubdd.de/katalog?TN_libero_mab2
}
}