| Board of Directors | 1956 – 1993 |
| Board of Directors | 1993 – 1996 |
| Board of Directors | 1992 – 1993 |
| Board of Directors | 1997 – 1999 |
| Board of Directors | 1956 – 1996 |
| Board of Directors | 1956 – 1992 |
| Board of Directors | 1996 – 1997 |
| Board of Directors | 1956 – 1992 |
| Board of Directors | 1996 – 1997 |
| Board of Directors | 1997 – 1999 |
| Chairman | 1956 – 1996 |
| Chairman | 1956 – 1993 |
| Board of Directors | 1997 – 1999 |
| Chairman | 1996 – 1997 |
| Chairman | 1997 – 1999 |
| Board of Directors | 1997 – 1999 |
| Board of Directors | 1956 – 1987 |
| Board of Directors | 1993 – 1995 |