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