Opp, C., Ziebolz, B., & Groll, M. (2018). Ecological, socio-economic and demographic analyses as prerequisites for sewage treatment problem solutions in rural areas. The case study of Dirlammen, Vogelsberg, Germany. DIE ERDE – Journal of the Geographical Society of Berlin, 149(2-3), 184–197. Retrieved from https://www.die-erde.org/index.php/die-erde/article/view/369