CONTAMINATION OF CZECH RIVERS AND DREISSENA POLYMORPHA WITH PCBs FROM THE POINT OF VIEW OF THE ORTHO SIDE CHLORINATED CONGENERS Publication Attachment: 08-236.pdf Authors: Pekarek, V, Ocelka, T, Grabic, R, Cirkva, V, Syc, M, Kodes, V, Leontovycova, D Year: 2008