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  1. 1
    Serial
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    Annals of the Geological Survey of Egypt.
  2. 2
    Published 1969
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    Information circular /
  3. 3
    Published 1933
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    Minerals yearbook /
  4. 4
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    Tätigkeitsbericht - Bundesanstalt für Geowissenschaften und Rohstoffe. Activity report - Federal Institute for Geosciences and Natural Resources.
  5. 5
    Published 1926
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    Economic geology series /

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