april 1972

april 1972: 228 companies

4. april 1972 6 companies

5. april 1972 10 companies

6. april 1972 12 companies

7. april 1972 13 companies

10. april 1972 11 companies

11. april 1972 11 companies

12. april 1972 11 companies

13. april 1972 7 companies

14. april 1972 14 companies

17. april 1972 6 companies

18. april 1972 12 companies

19. april 1972 14 companies

20. april 1972 13 companies

21. april 1972 19 companies

24. april 1972 4 companies

26. april 1972 17 companies

27. april 1972 20 companies

28. april 1972 28 companies