@book{2009,
url = {https://doi.org/10.3790/9783428531837},
title = {»Unsere Erde gibt es nur einmal«},
title = {Bekenntnisse zur Verantwortung für die Umwelt},
author = {},
publisher = {Duncker & Humblot},
address = {},
doi = {doi:10.3790/9783428531837},
isbn = {9783428531837},
year = {2009},
lastchecked = {2009}
}