"संग्रहीत प्रति". मूल से 13 जुलाई 2018 को पुरालेखित. अभिगमन तिथि 13 जुलाई 2018.
thebalance.com
Balance, Full Bio Follow Linkedin Follow Twitter Terence Bell wrote about commodities investing for The; Earth, Has Over 10 Years Experience in the Rare; Bell, minor metal industries Read The Balance's editorial policies Terence. "The World's 10 Largest Copper Producers". The Balance.