title: Occurrence and fate of the human pharmaceutical metabolite ritalinic acid in the aquatic system.
authors.affiliation: Bavarian Environment Agency, Kaulbachstr. 37, D-80539 Munich, Germany. marion.letzel@lfu.bayern.de
authors.forename: Marion
authors.initials: M
authors.lastname: Letzel
authors.forename: Klaus
authors.initials: K
authors.lastname: Weiss
authors.forename: Walter
authors.initials: W
authors.lastname: Schüssler
authors.forename: Manfred
authors.initials: M
authors.lastname: Sengl