4) Jensen, S., Johnels, A.G., Olsson, M. and Otterlind, G.: DDT and PCB in herring and cod from the Baltic, the Kattegat and the Skagerrak, Ambio Special Report, No.1, 71-85 (1972).
5) Curley, A., Burse, V.W., Grim, M.E., et al.: Polychlorinated biphenyls: Distribution and Storage in body fluids and tissues of Sherman rats, Environ. Res., 4, 481-495 (1971).