Copper Development Association (Great Britain). (1959). Introduction to copper (3rd ed.). Copper Development Association.
Chicago-referens (17:e uppl.)Copper Development Association (Great Britain). Introduction to Copper. 3rd ed. London: Copper Development Association, 1959.
MLA-referens (8:e uppl.)Copper Development Association (Great Britain). Introduction to Copper. 3rd ed. Copper Development Association, 1959.
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