"Ayrıca, XVIII. Heyet'in ikinci üyesi, büyük ihtimalle Hintlilerin ödediği haraç olan altın tozunu içeren dört adet küçük ama açıkça ağır kavanozu boyunduruk üzerinde taşıyor." Iran, Délégation archéologique française en (1972). Cahiers de la Délégation archéologique française en Iran. Institut français de recherches en Iran (section archéologique). s. 146.
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La Niece, Susan (senior metallurgist in the British Museum Department of Conservation and Scientific Research) (15 Aralık 2009). Gold. Harvard University Press. s. 10. ISBN978-0-674-03590-4. 18 Nisan 2023 tarihinde kaynağından arşivlendi. Erişim tarihi: 10 Nisan 2012.
Fritz, Morgane; McQuilken, James; Collins, Nina; Weldegiorgis, Fitsum (Ocak 2018). "Global Trends in Artisanal and Small-Scale Mining (ASM): A review of key numbers and issues" (Rapor). Winnipeg Kanada: International Institute for Sustainable Development. 7 Ağustos 2020 tarihinde kaynağından(PDF) arşivlendi. Erişim tarihi: 24 Şubat 2021 – Intergovernmental Forum on Mining, Minerals, Metals and Sustainable Development vasıtasıyla.