You can use Word's Catalogue/Directory Mailmerge facility for this (the terminology depends on the Word version). To see how to do so with any mailmerge data source supported by Word, check out my Microsoft Word Catalogue/Directory Mailmerge Tutorial, in the 'Sticky' thread at the top of this forum:
Microsoft Word Catalogue/Directory Mailmerge Tutorial
The tutorial covers everything from list creation to the insertion & calculation of values in multi-record tables in letters. Do read the tutorial before trying to use the mailmerge document included with it.

For some recent, worked examples, see the attachment to the posts at:
https://www.msofficeforums.com/mail-...html#post23345
https://www.msofficeforums.com/mail-...html#post30327

Alternatively, you may want to try a Many-to-One Mail Merge add-in from either:
• Graham Mayor at: Merge Many To One
• Doug Robbins' Windows Live SkyDrive page at: Microsoft OneDrive - Access files anywhere. Create docs with free Office Online.

__________________
Cheers,
Paul Edstein
[Fmr MS MVP - Word]