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In my former articles published in this Bulletin§ and in Science§§ (Chinese), I have attempted to show that the early possible date of using zinc in China can be traced since Han Dynasty (201 B. C.—200 A. D.), and
In my former articles published in this Bulletin§ and in Science §§ (Chinese), I have attempted to show that the early possible date of using zinc in China can be traced since Han Dynasty (201 B. C.-200 A. D.), and