<li>Illustration XVIII (<a idref="sect316">Section 316</a>)</li>
<li>Illustration XIX (<a idref="sect323">Section 323</a>)</li>
<li>Illustration XX (<a idref="sect336">Section 336</a>)</li>
<li>Illustration XVIII (<a idref="sect316">Section 316</a>)</li>
<li>Illustration XIX (<a idref="sect323">Section 323</a>)</li>
<li>Illustration XX (<a idref="sect336">Section 336</a>)</li>