989
  %C New York
  %I Knopf
  %D 1990
</span>
</p>

<h4 id="K" class="docs fields">%K &ndash; keywords</h4>

<p>
<kbd>Refer</kbd> hates ambiguity, and complains when encountering
it.  Ambiguities result from the duplication of any word in more
than one database record when that word is used to identify a
reference in your input file.  Use <kbd>%K</kbd> to create unique
keywords found nowhere else in the database.
</p>

<p>
Imagine, for example, that your database contains records for
Ray Bradbury&#8217;s <