april 1971

april 1971: 68 companies

1. april 1971 6 companies

5. april 1971 2 companies

6. april 1971 3 companies

7. april 1971 2 companies

8. april 1971 3 companies

10. april 1971 1 companies

15. april 1971 4 companies

16. april 1971 2 companies

17. april 1971 1 companies

19. april 1971 2 companies

20. april 1971 6 companies

21. april 1971 3 companies

22. april 1971 6 companies

23. april 1971 4 companies

24. april 1971 2 companies

26. april 1971 4 companies

27. april 1971 3 companies

28. april 1971 4 companies

29. april 1971 5 companies

30. april 1971 5 companies