1. DDT and PCB levels and reproduction in ringed seal from the Bothman Bay;Helle;Ambio,1976
2. PCB lev els correlated with pathological changes in seal uteri;Helle;Ambio,1976
3. Pathology of Baltic grey seal and ringed seal females with special reference to adrenocortical hyperplasia Is environmental pollution the cause of a widely distributed disease syn drome?;Bergman;Finn Game Res,1985
4. Residue levels of organochlonne and mercury com pounds in unhatched eggs and the relationships to breeding success in white tailed sea eagles Haliaeetus albicilla in Sweden;Helander;Holoarct Ecol,1982
5. DDT and PCB in marine animals from Swedish waters;Jensen;Nature,1969