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Animal reference searchable by information and media type

A multilingual encyclopedia with a language-aware search

Related English words for revising a draft

Math and electrical calculations in a compact tool directory

Chemical calculations with balancing and molar-mass tools

Find destination tours, attraction tickets and travel experiences

A wide subject reference to West Virginia

Scholarly search with author, publication and date controls

Structural language properties in a comparative database

An independent reference for Steam catalogue and activity data

British and Irish case law and legislation

Educational collections of historical source texts

A configurable vault for credentials and reference data

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

Discover peer-reviewed open-access books and publishers

Discover linked publications, datasets and research software

Physical constants linked to units and uncertainty guidance

Spectral lines and atomic energy-level reference data

Search legislation and congressional records

Histories of English words and their earlier forms

Visual-art history through artists, movements and ideas