[Mailman-Users] Help sending to multiple lists

I am working with a community radio station which has multiple lists in Mailman that are used to contact volunteers. A volunteer can be on several of the lists. We frequently want to send to all volunteers. Is there a way to send to all the lists, with out duplicates? One way this could happen would be to merge all the lists, eliminate duplicates, and send to the resulting list. Is there a script that will do this or some other way of accomplishing sending an email to multiple lists without duplicates? Any suggestions welcome.

Bardwell Consulting Robert A(ndy) Bardwell, Ph.D. 4801 W. Yale Ave. Denver, CO 80219 Voice: 303-934-3851 Cell: 720-219-3627 Fax: 303-975-8513 www.bardwellconsulting.com