# Q74921051
**Wikidata**: [Q74921051](https://www.wikidata.org/wiki/Q74921051)  
**Source**: https://4ort.xyz/entity/q74921051


## References

1. SIMBAD
2. A spectroscopic search for chemically stratified white dwarfs in the Sloan Digital Sky Survey
3. DA white dwarfs in Sloan Digital Sky Survey Data Release 7 and a search for infrared excess emission
4. The SDSS Photometric Catalog, Release 9
5. Gaia Data Release 2
6. The ninth data release of the Sloan Digital Sky Survey: first spectroscopic data from the SDSS-III baryon oscillation spectroscopic survey