திறந்த அணுகல் மின்புத்தகங்கள் – Open Access Books
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Digital Library of India
31 -
Directory of Open Access Books: DOAB
6
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e-Book Engineering Core (EBSCO)
9
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E-Books Directory
20
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EOLSS - Encyclopedia Life Support Systems (UNESCO)
1
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GALILEO Open Learning Materials
5
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HathiTrust Digital Library
4
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Internet Archive
1
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McGraw Hill Access Engineering
4
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MERLOT
2
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Million books project
5
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OAPEN
2
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Project Gutenberg
1
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Teaching Commons Open Educational Resources
3
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The National Academies Press
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UC Press E-Books Collection, 1982-2004
2
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University Press ebooks, Purdue University
3
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World eBook Library
5