Porfyr (Norwegian Wikipedia)

Analysis of information sources in references of the Wikipedia article "Porfyr" in Norwegian language version.

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academia.edu

books.google.com

brepolsonline.net

carnegiemnh.org

  • Wilson, Debra : «Born to the Purple», Carnegie Museum of Natural History. Sitat: «...has a hardness of 7 out of 10 on the Mohs hardness scale, comparable to steel or quartz»

core.ac.uk

doi.org

etymonline.com

genuki.org.uk

geologybase.com

google.no

google.no

books.google.no

jstor.org

louvre.fr

cartelfr.louvre.fr

merriam-webster.com

naob.no

ntnu.no

ntnuopen.ntnu.no

  • Vinje, Matias (juni 2022): Studie av metylenblå- og sandekvivalentmetoden for materialer til asfalttilslag, Masteroppgave i Geologi, NTNU (nedlastbare som PDF)

roger-pearse.com

saudiaramcoworld.com

semanticscholar.org

api.semanticscholar.org

smithsonianmag.com

soton.ac.uk

arch.soton.ac.uk

srce.hr

hrcak.srce.hr

themodernantiquarian.com

web.archive.org