# Theodorus Lambertus Haitjema
**Wikidata**: [Q23888800](https://www.wikidata.org/wiki/Q23888800)  
**Source**: https://4ort.xyz/entity/theodorus-lambertus-haitjema


## References

1. Catalogus Professorum Academiae Groninganae
2. Virtual International Authority File
3. CiNii Research
4. Biografisch Portaal
5. IdRef