[1]
Bartholdy, J. 1988. Problems of regional hydrology; methodology, case studies: sth report of the IG U Working Group on the IHP. Eds.: Heidulf E. Müller, Karl-Rainer Nippes. (Beiträge zur Hydrologie. Sonderheft 5, 1-2). Geografisk Tidsskrift. 88, (jan. 1988).