Pierre Shale (Portuguese Wikipedia)
Analysis of information sources in references of the Wikipedia article "Pierre Shale" in Portuguese language version.
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discoverfossils.com
- Canadian Fossil Discovery Centre. «All About Bruce». Arquivado do original em 6 de novembro de 2014
doi.org
dx.doi.org
- Gill, J. R.; Cobban, W. A.; Kier, P. M. (1966). «The Red Bird section of the Upper Cretaceous Pierre Shale in Wyoming». Professional Paper. ISSN 2330-7102. doi:10.3133/pp393a
nmt.edu
nmgs.nmt.edu
- MacLachlan, M.E. (1976). «Lexicon of rock-stratigraphic units in Union, Colfax, Mora, and eastern Taos Counties, New Mexico» (PDF). New Mexico Geological Society Field Conference Series. 27: 205–215. Consultado em 14 de outubro de 2021
web.archive.org
- Canadian Fossil Discovery Centre. «All About Bruce». Arquivado do original em 6 de novembro de 2014
worldcat.org
- Gill, J. R.; Cobban, W. A.; Kier, P. M. (1966). «The Red Bird section of the Upper Cretaceous Pierre Shale in Wyoming». Professional Paper. ISSN 2330-7102. doi:10.3133/pp393a