NGC 1664

Number of stars per data source

	Reference  307 :    1 star
	Reference  426 :    2 stars
	Reference  504 :    1 star

References

 307
Westin T.N.G.
(1982) Astron. Astrophys. Suppl. 49, 561
Four-color and Hbeta photometry for O-A0 type stars in three regions near the galactic equator
1982A&AS...49..561W
 426
Alania I.F., Abuladze O.P., West R.M.
(1989) Astron. Astrophys. Suppl. 77, 333
uvby beta Photometry of peculiar B and A stars, discovered at Abastumani
1989A&AS...77..333A
 504
Olsen E.H.
(1993) Astron. Astrophys. Suppl. 102, 89
Stromgren four-colour uvby photometry of G5-type HD stars brighter than mv = 8.6
1993A&AS..102...89O