@book
{TN_libero_mab2,
author = {
Albrecht, Hartmut
},
title = {
Agricultural extension
2 Examples and background material / Hartmut Albrecht ..
},
publisher = {TZ-Verl.-Ges.},
isbn = {388085405X},
year = {1990},
booktitle = {Sonderpublikation der GTZ ; 238},
address = {
Rossdorf
},
url = {
http://slubdd.de/katalog?TN_libero_mab2
}
}