April 1961

April 1961: 101 companies

4 April 1961 3 companies

5 April 1961 3 companies

6 April 1961 6 companies

7 April 1961 4 companies

10 April 1961 5 companies

11 April 1961 3 companies

12 April 1961 5 companies

13 April 1961 2 companies

14 April 1961 1 companies

17 April 1961 5 companies

18 April 1961 5 companies

19 April 1961 9 companies

20 April 1961 10 companies

21 April 1961 7 companies

24 April 1961 6 companies

26 April 1961 10 companies

27 April 1961 10 companies

28 April 1961 7 companies