# Q66607430
**Wikidata**: [Q66607430](https://www.wikidata.org/wiki/Q66607430)  
**Source**: https://4ort.xyz/entity/q66607430


## References

1. SIMBAD
2. Some spectroscopic characteristics of OB stars: an investigation of the space distribution of certain OB stars and the reference frame of the classification
3. Photoelectric measures of the 4430 A diffuse interstellar band
4. The Uppsala spectral classification
5. Color excesses from six-color photometry of supergiant stars
6. The space distribution of early-type stars in Cygnus
7. Six-color photometry of stars. VIII. The colors of 409 stars of different spectral types
8. Studies in galactic structure. II. Luminosity classification for 1270 blue giants stars
9. Recherches sur la loi d'absorption de la poussiere interstellaire et sur le spectre continu des etoiles O et B
10. Studies in galactic structure. I. A preliminary determination of the space distribution of the blue giants
11. A study of the concentration of early-type stars in Cygnus
12. Variability survey of brightest stars in selected OB associations
13. The Tycho-2 catalogue of the 2.5 million brightest stars
14. Gaia Data Release 2
15. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
16. The IACOB project. III. New observational clues to understand macroturbulent broadening in massive O- and B-type stars