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The quality of synthetic diamonds has improved so much they are hard to tell from real diamonds.
It is an educational content of CK-12 Foundation (to access some of the CK-12 contents you must be logge ...
Aunt Louisa's nursery favourite is a fictious and illustrated story for the young readers.
It is an ebook from The International Children's Digital Library, a project of the ICDL Foundation in collabor ...
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