NGC 7031

Number of stars per data source

	Reference    2 :   41 stars
	Reference  103 :    9 stars

2: Hoag A.A., Johnson H.L., Iriarte B., Mitchell R.I., Hallam K.L., Sharpless S.; (1961) Publ. Us. Nav. Obs. XVII part VII, 347; Photometry of stars in galactic cluster fields
103: Hassan S.M., Barbon R.; (1973) Mem. Soc. Astron. Italiana 44, 39; A photometric study of the open cluster NGC 7031; 1973MmSAI..44...39H