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