Trumpler 18

Number of stars per data source

	Reference    1 :    2 stars
	Reference    2 :    3 stars
	Reference    3 :    1 star
	Reference    5 :    1 star
	Reference    6 :    1 star

References

 1

Stromgren B., Perry C.L.

(1965) Astron. J. 71, 709

Institute for Advanced Study, Princeton, N. J. second version, unpublished Crawford D.L., Barnes J.V., Faure B.Q., Golson J.C. Photoelectric Hbeta photometry for 1217 stars brighter than V = 6.5 mag

1965AJ.....71..709

 2

Crawford D.L., Perry C.L.

(1966) Astron. J. 71, 206

Four-color and Hbeta photometry of open clusters I. The Hyades

1966AJ.....71..206C

 3

Crawford D.L., Barnes J.V.

(1969) Astron. J. 74, 407

Four-color and Hbeta photometry of open clusters II. Coma and Ursa Major

1969AJ.....74..407C

 5

Cameron R.C.

(1966) Georgetown Obs. Monogr. no. 21

An investigation of the magnetic and related stars through narrow-band photometry

 6

Crawford D.L., Barnes J.V.

(1969) Astron. J. 74, 1008

Interstellar reddening for globular clusters M3 and M13

1969AJ.....74.1008C