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You can't. The theory required you to get samples and send them to a lab, which wouldn't exactly be practical in the field anyway. METAL ABSORPTION BY EQUISETUM (HORSETAIL) A19 GOLD ...
You can't. The theory required you to get samples and send them to a lab, which wouldn't exactly be practical in the field anyway. METAL ABSORPTION BY EQUISETUM (HORSETAIL) A19 GOLD ...