@book
{TN_libero_mab2,
author = {
Helferich, Burckhardt
},
title = {
Methoden der organischen Chemie
4,2 Allgemeine chemische Methoden / bearb. von B. Helferich ...
},
publisher = {Thieme},
year = {1955},
address = {
Stuttgart
},
url = {
http://slubdd.de/katalog?TN_libero_mab2
}
}