# CQ DL

> periodical literature

**Wikidata**: [Q954554](https://www.wikidata.org/wiki/Q954554)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/CQ_DL)  
**Source**: https://4ort.xyz/entity/cq-dl


## References

1. German Union Catalogue of Serials
2. ISSN Portal