April 1958

April 1958: 30 companies

1 April 1958 1 companies

2 April 1958 4 companies

3 April 1958 3 companies

8 April 1958 3 companies

10 April 1958 1 companies

15 April 1958 1 companies

16 April 1958 2 companies

17 April 1958 2 companies

18 April 1958 2 companies

21 April 1958 2 companies

23 April 1958 1 companies

24 April 1958 1 companies

25 April 1958 2 companies

28 April 1958 2 companies

29 April 1958 2 companies

30 April 1958 1 companies