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  • Mohsen Manutchehr-Danai

Keywords

Hardness Pencil Rock Crystal Suitable Mineral Copper Coin Smoky Quartz 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • Mohsen Manutchehr-Danai
    • 1
  1. 1.RegensburgGermany

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