Filtering for unique entries based on one column

This may be a basic question but I haven't been able to find the solution:

I'm using Excel 2003. I have a list with repetitive entries in one column and unique entries in the other columns. Example

0001 a
0001 b
0002 c
0002 d
0003 e
0003 f

I need to filter the list so that only unique entries in the first column show up, but I need the rest of the information to carry with it. Example:

0001 a
0002 c
0003 f

I can't use the Avanced Filter > Unique Entries Only function because the information in the adjoining columns is not unique. Please help! Thanks.