Νιόβιο (Greek Wikipedia)

Analysis of information sources in references of the Wikipedia article "Νιόβιο" in Greek language version.

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  • National Materials Advisory Board (U.S.). Committee on the Technical Aspects of Critical and Strategic Materials (1983). Tantalum and columbium supply and demand outlook. National Academies. Ανακτήθηκε στις 20 Απριλίου 2011. 

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  • Nave, Carl R. «Superconducting Magnets». Georgia State University, Department of Physics and Astronomy. Ανακτήθηκε στις 5 Ιουνίου 2011. 

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  • John F. Papp (Ιανουαρίου 2011). «NIOBIUM (COLUMBIUM) AND TANTALUM». 2009 Minerals Yearbook.[ADVANCE RELEASE] (PDF). U.S. Geological Survey. Ανακτήθηκε στις 10 Απριλίου 2011. 
  • Larry D. Cunningham. «Columbium (Niobium)». Commodity Statistics and Information (PDF). USGS MineralsInformation. Ανακτήθηκε στις 13 Απριλίου 2011. 

tin.er.usgs.gov

wahchang.com

  • Niobium (PDF). WahChang. An Allegheny Technologies Company. Ανακτήθηκε στις 12 Μαΐου 2011. 

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worldcat.org