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The unedited early twentieth-century Jewish Encyclopedia

Mathematician biographies and historical essays

An interconnected reference for advanced mathematical ideas

Amphibian reference with species and geography searches

Reference articles on Georgia's history and culture

French dictionary and encyclopedia reference

Public legal texts alongside explanatory reference material

Philosophy reference searchable by topic and context

Pali-canon translations with several routes into the text

Louisiana reference entries across history and culture

English-language reference to Ukraine and its diaspora

Biographical and bibliographical reference to classical scholarship

Element information with history and periodic trends

Biographical lookup with period and occupation filters

Structured knowledge connected across Wikimedia projects

Find preserved research datasets with citable records

Exoplanet records and mission data in a research archive

Open textbooks and educational materials across disciplines

Technical data and calculations for engineering study

Read and compare constitutions by topic

A music-score library with structured browsing

An index of hymn texts, tunes and hymnals

Language classification linked to bibliographic reference

Psychology modules assembled into adaptable textbooks