A family of Microsoft relational database management systems designed for ease of use.
As far as I know, you will need to use some VBA to do this.
Here are links (url) to three examples on concatenating a field from multiple records into one field in one record.
Duane Hookom
http://www.rogersaccesslibrary.com/forum/forum_posts.asp?TID=16
Allen Browne
http://allenbrowne.com/func-concat.html
The Access Web