No, Word can only use a single flat file as a data source. Therefore, you
would need to combine the datasources into such a file outside of Word to be
able to use mail merge with that data.
Of course, using VBA, you can create a "roll-your-own" equivalent to mail
merge that can do more that Word's mail merge is capable of "out of the
box".
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Hope this helps.
Please reply to the newsgroup unless you wish to avail yourself of my
services on a paid consulting basis.
Doug Robbins - Word MVP