@book
{TN_libero_mab2,
author = {
Vermeer, Martin
},
title = {
FGI studies on satellite gravity gradiometry
},
publisher = {},
year = {19XX-},
booktitle = {Suomen Geodeettisen Laitoksen tiedonantoja .},
address = {
Helsinki
},
url = {
http://slubdd.de/katalog?TN_libero_mab2
}
}