[Gt. Brit. Directorate of] Overseas Geological Surveys. Mineral Resources Division. Statistical summary of the mineral industry. H. M. Staty. Off.
Chicago-referens (17:e uppl.)[Gt. Brit. Directorate of] Overseas Geological Surveys. Mineral Resources Division. Statistical Summary of the Mineral Industry. London: H. M. Staty. Off.
MLA-referens (9:e uppl.)[Gt. Brit. Directorate of] Overseas Geological Surveys. Mineral Resources Division. Statistical Summary of the Mineral Industry. H. M. Staty. Off.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.