April 1960

April 1960: 18 companies

1 April 1960 3 companies

5 April 1960 1 companies

6 April 1960 1 companies

10 April 1960 1 companies

12 April 1960 3 companies

13 April 1960 1 companies

22 April 1960 1 companies

23 April 1960 1 companies

25 April 1960 1 companies

26 April 1960 2 companies

27 April 1960 1 companies

29 April 1960 1 companies

30 April 1960 1 companies