# SM U-33

> German Type U 31 U-boat

**Wikidata**: [Q825989](https://www.wikidata.org/wiki/Q825989)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/SM_U-33_(Germany))  
**Source**: https://4ort.xyz/entity/sm-u-33


## References

1. Freebase Data Dumps. 2013