| Letters |
1080 |
| Proceedings & Article |
6 |
| Newspaper Articles & Proceedings |
3 |
| Newspaper Articles |
2 |
| Proceedings & Newspaper Articles |
2 |
| Proceedings and Report |
2 |
| Articles |
1 |
| Articles & Newspaper Articles |
1 |
| Newspaper Article & Report |
1 |
| Newspaper Articles & Articles |
1 |
| Newspaper Articles & Speech |
1 |
| Proceedings & Articles |
1 |
| Proceedings & Report |
1 |