centre
string in the headers/footers that appear on bibliography
pages, or if you do not have a running header/footer
centre string in the body of the document, invoke
<kbd>.BIBLIOGRAPHY_HEADER_CENTER</kbd> (or
<kbd>.BIBLIOGRAPHY_FOOTER_CENTER</kbd>) with no argument before
defining the centre string .  Mom&#8217;s default is NOT to print the
centre string.
</p>

<p>
If, for some reason, having enabled the header/footer centre string
on bibliography pages, you wish to disable it, invoke the same macro
with 