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Metric and imperial conversion with reference charts

Chemical calculations with balancing and molar-mass tools

Find destination tours, attraction tickets and travel experiences

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

A wide subject reference to West Virginia

A subject-organized reference to Alabama

Regional history connected to Philadelphia's present

Discover linked publications, datasets and research software

Physical constants linked to units and uncertainty guidance

Search legislation and congressional records

Taxonomic lookup for living reptile species

Treaty records and depositary information

Visual-art history through artists, movements and ideas

Physiological principles connected across body systems

Bible reading with saved notes and companion study resources

Bible search with precise control over the books searched

A curated registry of biological and biomedical ontologies

A reference to cultural expression and European nationalism

Historical maps with text search and geographic viewing tools

A collaboratively written mathematics encyclopedia

A global bird classification with English naming guidelines