@book
{TN_libero_mab2,
author = {
Leibniz, Gottfried Wilhelm
Schmidt, Franz
},
title = {
Fragmente zur Logik
},
publisher = {Akad.-Verl.},
year = {1960},
booktitle = {Philosophische Studientexte},
address = {
Berlin
},
url = {
http://slubdd.de/katalog?TN_libero_mab2
}
}