# Congress of Industrial Organizations

> North American federation of labor unions from 1935 to 1955

**Wikidata**: [Q1023739](https://www.wikidata.org/wiki/Q1023739)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Congress_of_Industrial_Organizations)  
**Source**: https://4ort.xyz/entity/congress-of-industrial-organizations


## References

1. Virtual International Authority File
2. CiNii Research
3. [Source](https://archives.lib.umd.edu/repositories/2/resources/1458)
4. [Source](https://archives.lib.umd.edu/repositories/2/resources/1492)
5. [Source](https://archives.lib.umd.edu/repositories/2/resources/1574)
6. [Source](http://hdl.handle.net/1903.1/42586)
7. [Source](https://archives.lib.umd.edu/repositories/2/resources/1553)
8. Freebase Data Dumps. 2013