@misc{indiciaea67fe8a3cee7,
  title = {Search for high-calcium limestone in Silurian reefs of northern Indiana},
  author = {C.H. Ault and D.D. Carr},
  year = {1981},
  doi = {10.1130/0016-7606(1981)92<641:sfhlis>2.0.co;2},
  url = {https://pubs.usgs.gov/publication/70012093},
  note = {Source identifier: 70012093}
}