@misc{indiciae21da009bca26,
  title = {Stable isotope and trace element studies of black bear hair, Big Bend ecosystem, Texas and Mexico},
  author = {W.C. Pat Shanks and Eric C. Hellgren and Craig A. Stricker and Pamela A. Gemery-Hill and David P. Onorato},
  year = {2008},
  url = {https://pubs.usgs.gov/publication/70180879},
  note = {Source identifier: 70180879}
}