@article{article749cd99b,
title   = {New stromatolites from the upper Precambrian Açungui Group, Eastern Paraná, Brazil, and their potential stratigraphic use},
author = {Fairchild, Thomas R.},
year = {1982},
doi = {10.11606/issn.2316-8978.v13i0p43-50},
journal   = {Boletim IG}
}