# extraction of crude petroleum and natural gas

> economic activity

**Wikidata**: [Q12089268](https://www.wikidata.org/wiki/Q12089268)  
**Source**: https://4ort.xyz/entity/extraction-of-crude-petroleum-and-natural-gas


## References

1. Statistical Classification of Economic Activities in the European Community, Rev. 2 (2008)
2. International Standard Industrial Classification Rev. 4
3. [Source](http://statbel.fgov.be/nl/statistieken/gegevensinzameling/nomenclaturen/nacebel/)
4. Nomenclature d'activités française, rév. 2