General Encyclopaedia:
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Oxford Reference is the premier online reference product, covering 25 different subject areas and bringing together 2 million digitized entries from Oxford University Press’s Dictionaries, Companions, and Encyclopedias.
Subject-specific Encyclopaedia:
Substantive, peer-reviewed, and regularly updated, the Oxford Research Encyclopedia of African History provides long-form, articles written by experts from the field.
Substantive, peer-reviewed, and regularly updated, the Oxford Research Encyclopedia of Education provides long-form, articles written by experts from the field.
Substantive, peer-reviewed, and regularly updated, the Oxford Research Encyclopedia of Linguistics provides long-form, articles written by experts from the field.
Image Encyclopaedia:
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Translated form Greek it means "rounded education"
As information sources they