• American Library Books

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• Directory of Open access Books(DOAB)

The primary aim of DOAB is to increase discoverability of Open Access books.

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• World Cat

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WorldCat is a union catalog which itemizes the collections of 72,000 libraries in 170 countries and territories[1] which participate in the Online Computer Library Center (OCLC) global cooperative. It is built and maintained collectively by the participating libraries.