# Q66631021
**Wikidata**: [Q66631021](https://www.wikidata.org/wiki/Q66631021)  
**Source**: https://4ort.xyz/entity/q66631021


## References

1. SIMBAD
2. Homogeneous photometry and metal abundances for a large sample of Hipparcos metal-poor stars
3. VizieR Online Data Catalog: Henry Draper Catalogue and Extension, published in Ann. Harvard Obs. 91-100 (1918-1925)
4. The USNO-B Catalog
5. Gaia Data Release 2
6. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
7. Lithium in old binary stars
8. New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s)