@book
{TN_libero_mab2,
author = {
Mertens, Klaus
},
title = {
Die St. Severikirche zu Erfurt
},
edition = {
6. - 8. Tsd.
}
,
publisher = {Union-Verl.},
keywords = {
Severikirche Erfurt
},
year = {1957},
booktitle = {Das christliche Denkmal ; 27},
address = {
Berlin
},
url = {
http://slubdd.de/katalog?TN_libero_mab2
}
}