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Educational tools for examining global facts and assumptions

Shakespeare texts with scholarly and educational context

A versioned taxonomic catalogue of spiders

A community-edited reference for recordings and releases

English definitions beside usage and collocation references

English dictionary lookup with explicit usage guidance

A global bird classification with English naming guidelines

Discover peer-reviewed open-access books and publishers

Discover linked publications, datasets and research software

Astronomical objects connected to literature and identifiers

Spectral lines and atomic energy-level reference data

Official MLA guidance on writing and documentation

A connected library of Jewish texts and commentaries

Minnesota historical entries filterable by topic and era

Oklahoma history searchable by name, era and topic

Cleveland historical articles with a multimedia search

Australian scientific history connected to archival sources

Taxonomic lookup for living reptile species

Treaty records and depositary information

Manuscript images and metadata for medieval-music study

Research explanations paired with charts and data explorers

Educational summaries on anesthesia and perioperative subjects

Nomenclatural reference for prokaryotic names

Taxonomic and distribution information about algae