| Filing Date | Form | Description | Filing Group | Downloads |
|---|---|---|---|---|
| 4 | Statement of changes in beneficial ownership of securities |
3,4,5
|
0000076334-20-000006.pdf 0000076334-20-000006.rtf | |
| 8-K | Report of unscheduled material events or corporate event |
Current Reports
|
0000076334-20-000004.pdf 0000076334-20-000004.rtf 0000076334-20-000004.xls EX-101.SCH - XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT | |
| 4 | Statement of changes in beneficial ownership of securities |
3,4,5
|
0000076334-19-000150.pdf 0000076334-19-000150.rtf | |
| 4 | Statement of changes in beneficial ownership of securities |
3,4,5
|
0000076334-19-000148.pdf 0000076334-19-000148.rtf | |
| 4 | Statement of changes in beneficial ownership of securities |
3,4,5
|
0000076334-19-000146.pdf 0000076334-19-000146.rtf | |
| 4 | Statement of changes in beneficial ownership of securities |
3,4,5
|
0000076334-19-000143.pdf 0000076334-19-000143.rtf | |
| 4 | Statement of changes in beneficial ownership of securities |
3,4,5
|
0000076334-19-000142.pdf 0000076334-19-000142.rtf | |
| 4 | Statement of changes in beneficial ownership of securities |
3,4,5
|
0000076334-19-000140.pdf 0000076334-19-000140.rtf | |
| 4 | Statement of changes in beneficial ownership of securities |
3,4,5
|
0000076334-19-000137.pdf 0000076334-19-000137.rtf | |
| 4 | Statement of changes in beneficial ownership of securities |
3,4,5
|
0000076334-19-000138.pdf 0000076334-19-000138.rtf |
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