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H. Laurens van der Laan The Sierra Leone diamonds
an economic study covering the years 1952-1961
Engels | 234 pagina's | Oxford University Press on behalf of Fourah Bay College, the University College of Sierra Leone, London [etc.] | 1965
Gedrukt boek
Industrial Diamond Information Bureau Proceedings of the first international congress on diamonds in industry
held at the Centre des Conférences Internationales, Paris, 28 May to 2 June, 1962
Engels | 407 pagina's | Industrial Diamond Information Bureau, London | 1963
Gedrukt boek