Context

Context of NOVA : metals, Season 43, Episode 19, Treasures of the earth, written, produced, and directed by Terri Randal ; narrated by Jay O. Sanders ; a NOVA production co-produced by Pioneer Film and Television Productions Limited with China International TV Corporation with CCTV-10 and PAAN Media Holdings Co. Limited, with KBS Korea in association with PBSd, for WGBH and KBS
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