NGC 6664
Number of stars per data source
Reference 42 : 1 star
References
- 42
- Kraft R. P., Camp D. C., Fernie J. D., Fujita C., Hughes W. T.
- (1958) Astrophys. J. 129, 50
- Line profiles for classical cepheid SV Vulpeculae and for supergiants Beta Aquarii and 9 Pegasi
- 1958ApJ...129...50K