@book
{TN_libero_mab2,
author = {
Petzoldt, Herbert
},
title = {
Das Fernmelderelais und seine Schaltung
},
edition = {
2. Aufl.
}
,
publisher = {Geest & Portig},
keywords = {
Fernmelderelais
},
year = {1952},
address = {
Leipzig
},
url = {
http://slubdd.de/katalog?TN_libero_mab2
}
}