@misc{indiciaeee3048925363,
  title = {Acid-insoluble residue/carbonate content of the Upper Cretaceous Niobrara Formation, Berthoud field, Denver basin, Colorado; a key factor for understanding natural fracturing in chalks?},
  author = {R. M. Pollastro},
  year = {1991},
  doi = {10.3133/ofr91330},
  url = {https://pubs.usgs.gov/publication/ofr91330},
  note = {Source identifier: ofr91330}
}