Unidad cronoestratigráfica (Spanish Wikipedia)

Analysis of information sources in references of the Wikipedia article "Unidad cronoestratigráfica" in Spanish language version.

refsWebsite

Global rank Spanish rank

1stratigraphy.org

2,562^nd place

1,282^nd place

1geoafricasciences.com

low place

low place

geoafricasciences.com

Gradstein, F. M.; Ogg, J. G.; Smith, A. G.; Bleeker, W. y Lourens, L. J. (2004). «A new Geologic Time Scale, with special reference to Precambrian and Neogene» (PDF). Episodes 27 (2): 83-100.

stratigraphy.org

Murphy, M. A. y Salvador, A. (eds.) (1999). Guide «International Stratigraphic Guide — An abridged version (International Subcommission on Stratigraphic Classification of IUGS, International Commission on Stratigraphy)». Episodes 22 (4): 255-271.