Reference

Computational queries across mathematics and factual topics

Language classification linked to bibliographic reference

A species catalogue with explicit release distinctions

A searchable reference to historical markers and memorials

Parallel Bible texts linked to language and commentary tools

Georeferenced earth and environmental research data

Biographical lookup with period and occupation filters

Exoplanet records and mission data in a research archive

A structured reference for gene-product functions

Technical data and calculations for engineering study

Quran, Hadith and Islamic history in one reference collection

Georgia historical collections with separate full-text searching

Primary sources on the history of science

Psychology modules assembled into adaptable textbooks

Fish reference lookup by common or scientific name

A reference to cultural expression and European nationalism

Find books and other items held by libraries

A detailed reference for mathematical functions

A library of peer-reviewed open-access scholarly books

Anatomy articles, diagrams and three-dimensional learning material

Bible reading with saved notes and companion study resources

Economics literature discovery through RePEc

Element information with history and periodic trends

Dictionary search with wildcard and meaning-based queries