| Filed On | Filing |
|---|---|
| 22 May 2000 | SOLICITING MATERIALS TO PROXY STATEMENT |
| 10 May 2000 | SOLICITING MATERIALS TO PROXY STATEMENT |
| 09 May 2000 | SOLICITING MATERIALS TO PROXY STATEMENT |
| 09 May 2000 | SOLICITING MATERIALS TO PROXY STATEMENT |
| 02 May 2000 | SOLICITING MATERIALS TO PROXY STATEMENT |
| 26 Apr 2000 | SOLICITING MATERIALS TO PROXY STATEMENT |
| 24 Apr 2000 | SOLICITING MATERIALS TO PROXY STATEMENT |
| 24 Apr 2000 | SOLICITING MATERIALS TO PROXY STATEMENT |
| 19 Apr 1999 | DEFINITIVE ADDITIONAL MATERIALS |
| 21 Apr 1995 | DEFINITIVE ADDITIONAL MATERIALS |
| 16 Mar 1995 | DEFINITIVE ADDITIONAL MATERIALS, COLUMBIA GAS |
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