@misc{indiciae9f4c1d08488c,
  title = {Origins and relationships of colonial Heliophyllum in the upper Middle Devonian (Givetian) of New York},
  author = {W. A. Oliver},
  year = {1997},
  url = {https://pubs.usgs.gov/publication/70019119},
  note = {Source identifier: 70019119}
}