@misc{indiciae995fbab5efe4,
  title = {Accelerator 14C dates for early upper paleolithic (basal Aurignacian) at El Castillo Cave (Spain)},
  author = {V.C. Valdes and J. L. Bischoff},
  year = {1989},
  doi = {10.1016/0305-4403(89)90023-x},
  url = {https://pubs.usgs.gov/publication/70015416},
  note = {Source identifier: 70015416}
}