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O'Reilly
10,225
Directory of Open Access Books
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OAPEN
168
National Center for Biotechnology Information
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81
Mohr Siebeck eBooks
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Nomos
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Springer eBooks 2005-
22
Digi20
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Making of the Modern World
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Springer Book Archives -2004
9
Ethnographic Video Online Vol. 1
3
JSTOR Open Access Books
1