# Aleksandr Ivanovič Efimov
**Wikidata**: [Q105816276](https://www.wikidata.org/wiki/Q105816276)  
**Source**: https://4ort.xyz/entity/aleksandr-ivanovi-efimov


## References

1. IdRef
2. NUKAT
3. [Source](https://plus.sr.cobiss.net/opac7/conor/52007945)
4. MAK
5. Catalog of the German National Library
6. [Source](http://mak.bn.org.pl/cgi-bin/KHW/makwww.exe?BM=1&NU=1&IM=4&WI=9810635699505606)
7. World Biographical Information System Online
8. National Library of Israel Names and Subjects Authority File