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A wide subject reference to West Virginia

Controlled terminology for art and cultural-heritage research

Educational tools for examining global facts and assumptions

Shakespeare texts with scholarly and educational context

A multilingual encyclopedia with a language-aware search

Related English words for revising a draft

A versioned taxonomic catalogue of spiders

A historical London map linked to texts and reference records

Concise biographies of figures in Welsh national life

A community-edited reference for recordings and releases

A collaboratively written mathematics encyclopedia

A subject-organized reference to Alabama

Regional history connected to Philadelphia's present

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

Physical constants linked to units and uncertainty guidance

Spectral lines and atomic energy-level reference data

Official MLA guidance on writing and documentation

A connected library of Jewish texts and commentaries

Quran reading and listening organized by surah and topic