Stephenson 1

Number of stars per data source

	Reference  354 :   12 stars
	Reference  360 :   17 stars

References

 354
Eggen O.J.
(1983) Mon. Not. R. Astr. Soc. 204, 391
Concentrations in the local association - II. The northern concentrations including the Alpha Persei, Pleiades, M34 and Delta Lyrae clusters
1983MNRAS.204..391E
 360
Anthony-Twarog B.J.
(1984) Astron. J. 89, 655
uvby photometry in M39 and Delta Lyrae
1984AJ.....89..655A