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