The following links are interspersed by quotations from them (resulting angular radii in parentheses have been added by me).
1st group: R = (960.46 +- 0.11)" [N=120] 2nd group: R = (959.85 +- 0.72)" [N=13]
Both: R = (960.40 +- 0.12)" [N=133]
3. If, with due allowance for the accuracies involved, this is compared to recent drift timing results obtained during a joint project by A.D. Wittmann at Tenerife in 1981/1990-1997 (1st group) and by M. Bianda at Locarno in 1990-1997 (2nd group), viz.
1st group: R = (960.59 +- 0.03)" [N=7627] 2nd group: R = (960.59 +- 0.05)" [N=2244]
Both: R = (960.59 +- 0.02)" [N=9871]