NGC 6664

Number of stars per data source

	Reference   27 :   31 stars
	Reference  664 :    1 star
	Reference  863 :    2 stars

References

 27

Arp H.C.

(1958) Astrophys. J. 128, 166

Cepheids in galactic clusters. III. EV Sct in NGC 6664

1958ApJ...128..166A

 664

Dean J.F.

(1977) Mon. Not. Astr. Soc. Sth Africa 36, 3

B, V, I, Photometry of southern Cepheids

1977MNSSA..36....3D

 863

Roslund C.

(1962) Ark. Astron. 3, 97

A survey of O and B stars in a region of Scutum

1962ArA.....3...97R