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•  Argentina (3)
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•  East Africa (1)
•  France (43)
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•  Great Britain (7)
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•  Guinea (8)
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•  Mexico (23)
•  Morocco (1)
•  Mozambique (3)
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•  Nigeria (3)
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•  Switzerland (1)
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•  Uruguay (6)
•  USA (57)
•  Venezuela (23)
•  Yugoslavia (2)

Theme

•  Mines : coal (3)
•  Mines : gold (1)
•  Mines and quarries (10)