Unexplained Gonad Alterations in Whitefish from Lake Thun, Switzerland: Levels of Persistent Organic Pollutants in Different Morphs Publication Attachment: 08-586.pdf Authors: Bogdal, C, Schmid, P, Naef, M, Zennegg, M, Kohler, M, Bernet, D, Scheringer, M, Hungerbuehler, K Year: 2008