Secondary Sources

• * Archival Research Catalog (ARC)
• * Citeseer - UPenn Digital Library - Science
• * CiteULike
• * Encyclopedia Britannica
• * ERIC - Education Literature
• * Google Scholar
• * ILO statistics and databases
• * Indian Science Abstract
• * Library of Congress
• * National Archives of India
• * NBIL - National Bibliography of Indian Languages
• * Scirus-Science Search Engine
• * UNESCO
• * WHO
• * World Bank Data