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A search across published encyclopedias and reference books

Australian Sign Language videos and topic lookup.

A collaboratively written mathematics encyclopedia

A subject-organized reference to Alabama

Minnesota historical entries filterable by topic and era

Biographical and bibliographical reference to classical scholarship

Overlay astronomical catalog data on sky images

A searchable reference to science-fiction writing and subjects

An A-to-Z route into global public-health subjects

Norwegian encyclopedia entries across a broad subject range

Indonesia's cross-government data portal

A collection of dictionaries, companions and encyclopedias