@book
{TN_libero_mab2,
author = {
Broermann, Barbara
},
title = {
Introducing prices for formerly free value-added services
},
publisher = {},
keywords = {
Hochschulschrift
,
Preis
},
year = {2011},
address = {
},
url = {
http://slubdd.de/katalog?TN_libero_mab2
}
}