Collection:CK-12 Foundation

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Title CK-12 Foundation
URL http://www.ck12.org/flexr
Type Books
Description This collection is to link to official CK-12 Foundation books. An official "CK-12 Foundation" book is one published by CK-12 Foundation and not by the general public using the FlexBook system.
Books Book:21st Century Physics FlexBook, Book:Life Science, Book:Biology
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