# Q28737499
**Wikidata**: [Q28737499](https://www.wikidata.org/wiki/Q28737499)  
**Source**: https://4ort.xyz/entity/q28737499


## References

1. directory of German Library Codes
2. [Source](https://www.archivesportaleurope.net/directory/-/dir/ai/code/DE-R135)