NGC 3680

Number of stars per data source

	Reference    8 :   14 stars
	Reference   66 :    9 stars

8: McClure R.D.; (1972) Astrophys. J. 172, 615; The color excesses and metallicities of the open clusters NGC 2360 and NGC 3680; 1972ApJ...172..615M
66: Claria J.J., Lapasset E.; (1983) J. Astrophys. Astr. 4, 117; Astrophysical properties of red giants in three open clusters older than the Hyades; 1983JApA....4..117C