In a DB cataloguing journal articles, tblCatalogue links via an M-M
transition table to tblAuthors identifying the article author
name(s).  I wish to extend the DB to cover persons cited in the
articles, thus requiring a new table (e.g. tblPersonsCited).  However,
to the extent that persons cited may also be authors, this would imply
duplication.  Is there a way to set up a single table (e.g.
tblPersons) to cover both authors and persons cited ?