| Filed On | Filing |
|---|---|
| 14 Feb 2002 | HOUGHTON MIFFLIN |
| 31 Jan 2001 | AMENDMENT FILING |
| 22 Jan 2001 | HOUGHTON MIFFLIN CO. SCHEDULE 13G/A |
| 09 Feb 2000 | AMENDMENT FILING |
| 01 Feb 2000 | FORM SC13G/A - IPSCO INC. |
| 31 Jan 2000 | FORM SC13G/A - IPSCO INC. |
| 31 Jan 2000 | SC 13G FILING OF 1/31/00 |
| 10 Feb 1999 | AMENDMENT FILING |
| 08 Dec 1998 | SC 13G/A |
| 09 Apr 1998 | AMENDMENT FILING |
| 12 Feb 1998 | AMENDMENT 1 |
| 04 Feb 1998 | SC 13G/A |
| 10 Apr 1997 | SC 13G/A |
| 13 Feb 1995 | SC 13G/A |
| 08 Nov 1994 | SCHEDULE 13G - 11-10-94 - HOUGHTON MIFFLIN COMPANY |
| 09 Mar 1994 | SCHEDULE 13G - 3-10-94 - HOUGHTON MIFFLIN COMPANY |
| 17 Feb 1994 | SC 13G/A |
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