Concatenate records with same data across two fields

Hi
I am using MS ACCESS 2003 on XP Pro and was hoping you could help me.

I have a query that displays duplicate records based on two fields. I would like concatenate all dupicate data into one record. For example (field names first row):
F1, F2, F3
A, 2, Church
A, 2, Library
B, 1, Station
B, 1, <Null>
B, 1, Post Office
C, 5, Hall

I would like to concatenate as follows:

F1, F2, F3
A, 2, Church Library
B, 1, Station <Null> Post Office
C, 5, Hall

Ideally I would like the solution in SQL but if its best to use vba please supply basis if you can.

Thanks