# Expedition 21

> 21st long-duration mission to the International Space Station

**Wikidata**: [Q17212](https://www.wikidata.org/wiki/Q17212)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Expedition_21)  
**Source**: https://4ort.xyz/entity/expedition-21


## References

1. [Source](http://www.nasa.gov/mission_pages/station/expeditions/expedition21/index.html)
2. Freebase Data Dumps. 2013
3. [Source](https://www.energia.ru/ru/iss/iss21/iss-crew21.html)