@misc{indiciae082b13d66c3f,
  title = {Pesticide and PCB residues for loggerhead shrikes in the Shenandoah Valley},
  author = {A. K. Blumton and J.D. Fraser and R.W. Young and S. Goodbred and S.L. Porter and D.L. Luukkonen},
  year = {1990},
  doi = {10.1007/bf01700988},
  url = {https://pubs.usgs.gov/publication/70198473},
  note = {Source identifier: 70198473}
}