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	1.	The gold mines of Southern Africa. The history, technology and statistics of the gold Industry by Letcher, O [author] Material type: Text; Literary form: Not fiction Publisher: Johannesburg Letcher,O. 1936 Availability: Items available for loan: Library of General Geology (1). Add to cart (remove)
	2.	The gold mines of Southern Africa by Letcher, O [author] Material type: Text; Literary form: Not fiction Publisher: London Waterlow & Sons Ltd 1936 Availability: Items available for loan: Library of General Geology (1). Add to cart (remove)
	3.	South Central Africa by Letcher, O [author] Material type: Text; Literary form: Not fiction Publisher: Johannesburg Technical press Ltd 1932 Availability: Items available for loan: Library of General Geology (1). Add to cart (remove)
	4.	Congo Belge by Letcher, O [author] Series: Material type: Text; Literary form: Not fiction Publisher: London Waterlow & Sons Ltd 1935 Availability: Items available for loan: Library of General Geology (1). Add to cart (remove)
	5.	Congo belge by Letcher, O [author] Lectcher, O [editor] Series: Material type: Text; Literary form: Not fiction Publisher: Johannesburg Pan African Publications 1935 Availability: Items available for loan: Library of General Geology (1). Add to cart (remove)

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