periods

median date

St Germain

Bougival

9/6/1954-9/7/1954

24/06/54

x

16/11/1954-22/12/1954

04/12/54

x

7/6/1955-7/7/1955

22/06/55

x

2/7/1958-1/8/1958

16/07/58

x

x

20/11/1959-15/12/1959

02/12/59

x

16/3/1960-16/4/1960

31/03/1960

x