@misc{indiciae6169967f4ae4,
  title = {Carbon isotope turnover as a measure of arrival time in migratory birds},
  author = {Steffen Oppel and Abby N. Powell},
  year = {2009},
  doi = {10.1007/s10336-009-0434-y},
  url = {https://pubs.usgs.gov/publication/70173570},
  note = {Source identifier: 70173570}
}