@misc{indiciaeb6c76ea15b92,
  title = {Re–Os age for the Lower–Middle Pennsylvanian Boundary and comparison with associated palynoflora},
  author = {Nicholas J. Geboy and G.R Tripathy and Leslie F. Ruppert and C.F. Eble and B.M. Blake and J. L. Hannah and H. J. Stein},
  year = {2015},
  doi = {10.1016/j.coal.2015.01.002},
  url = {https://pubs.usgs.gov/publication/70164523},
  note = {Source identifier: 70164523}
}