Berkeley 31

Number of measures per data source

	Reference  385 :   28 measures
	Reference  571 :    6 measures

385: Scott J.E., Friel E.D., Janes K.A.; (1995) Astron. J. 109, 1706; Kinematics of the old open cluster system; 1995AJ....109.1706S
571: Yong D., Carney B.W., Texeira de Almeida M.L.; (2005) Astron. J. 130, 597; Elemental abundances ratios in stars of the outer galactic disk. I. Open clusters; 2005AJ....130..597Y