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• Lead Lead Is A Soft, Dense, Blue-gray Metal. Lead Occurs Naturally In ...

• Learn About Lead | US EPA

• [PDF] Lead - Utah State University Extension

• Lead - Wikipedia

• Where Does Lead Poisoning Come From?

• Lead Between The Lines | Nature Chemistry

• Common Sources Of Lead In The Home- EH

• Sources Of Lead - New York State Department Of Health

• Facts About Lead | Live Science

• Lead Poisoning - World Health Organization (WHO)

• [PDF] Where Does Lead Come From?

• [PDF] What Is Lead? - NC DHHS

• Sources Of Lead | Lead Poisoning | Health & Senior Services