@misc{indiciae237b1606bd4c,
  title = {Lead burden in mute swans from Denmark.},
  author = {B Clausen and K Elvestad and O Karlog},
  year = {1982},
  url = {https://pubmed.ncbi.nlm.nih.gov/7187486/},
  note = {Source identifier: 7187486}
}