# Q57998669
**Wikidata**: [Q57998669](https://www.wikidata.org/wiki/Q57998669)  
**Source**: https://4ort.xyz/entity/q57998669


## References

1. [Pola Esperantisto](http://anno.onb.ac.at/cgi-content/anno-plus?aid=e1c&datum=19340004&query=(((text:Leokadia)+(text:Warszawska)))&ref=anno-search&seite=30)
2. [Source](http://anno.onb.ac.at/cgi-content/anno-plus?aid=e0f&datum=1941&page=34&size=45&qid=JXYNV4VHHI0FRJQ9L55O9TF90JXF7B)
3. [Esperanto](http://anno.onb.ac.at/cgi-content/anno-plus?aid=e0f&datum=1946&page=36&size=45)