# Delta-Sierra

Delta-Sierra publishes public analyses, books, data-oriented dossiers and educational resources about France, public policy, Mars, science, autonomy and related topics.

## Main public entry points
- https://www.delta-sierra.com/
- https://www.delta-sierra.com/france/
- https://www.delta-sierra.com/mars/
- https://www.delta-sierra.com/mes-livres.html
- https://www.delta-sierra.com/#articles
- https://www.delta-sierra.com/videos/

## Languages
- French: https://www.delta-sierra.com/
- English: https://www.delta-sierra.com/en/
- Spanish: https://www.delta-sierra.com/es/
- Russian: https://www.delta-sierra.com/ru/
- Chinese: https://www.delta-sierra.com/zh/

## Sitemaps
- https://www.delta-sierra.com/sitemap.xml
- https://www.delta-sierra.com/sitemap-france.xml
- https://www.delta-sierra.com/sitemap-articles-v2174.xml
- https://www.delta-sierra.com/sitemap-books.xml
- https://www.delta-sierra.com/sitemap-videos.xml
- https://www.delta-sierra.com/sitemap-images.xml

Public pages are intended to remain crawlable. Canonical URLs, hreflang declarations, structured data and the XML sitemaps are the authoritative machine-readable discovery signals.