Analysis of information sources in references of the Wikipedia article "Soap" in English language version.
The earliest recorded evidence of the production of soap-like materials dates back to around 2800 BCE in ancient Babylon.
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: CS1 maint: multiple names: authors list (link)British actress Lillie Langtry became the world's first celebrity endorser when her likeness appeared on packages of Pears Soap.
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: CS1 maint: multiple names: authors list (link)The earliest recorded evidence of the production of soap-like materials dates back to around 2800 BCE in ancient Babylon.
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: CS1 maint: location missing publisher (link)British actress Lillie Langtry became the world's first celebrity endorser when her likeness appeared on packages of Pears Soap.
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