# Professional Paper

> journal

**Wikidata**: [Q107629220](https://www.wikidata.org/wiki/Q107629220)  
**Source**: https://4ort.xyz/entity/professional-paper


## References

1. WorldCat
2. British Library online catalogue
3. CiNii
4. SUDOC
5. National Collective Archive of Periodicals
6. [Library of Congress Online Catalog](https://lccn.loc.gov/sf85003059)
7. [Source](https://www.americangeosciences.org/information/georef/serials?page=245)
8. ISSN Portal
9. German Union Catalogue of Serials
10. [Source](https://gateway-bayern.de/BV035595462)
11. [Source](https://opac.k10plus.de/DB=2.299/PPNSET?PPN=129599891)
12. [Source](http://ezb.uni-regensburg.de/ezeit/?2502911)
13. [Source](http://swb.bsz-bw.de/DB=2.1/PRS=rdf/PPNSET?PPN=129599891)
14. CiNii Research
15. OpenAlex