april 1961

april 1961: 15 companies

1. april 1961 1 companies

4. april 1961 1 companies

5. april 1961 2 companies

8. april 1961 1 companies

10. april 1961 1 companies

14. april 1961 1 companies

15. april 1961 1 companies

17. april 1961 2 companies

18. april 1961 2 companies

21. april 1961 1 companies

25. april 1961 1 companies

26. april 1961 1 companies