<li>Illustration XVIII (<a idref="sect320">Section 320</a>)</li>
<li>Illustration XIX (<a idref="sect334">Section 334</a>)</li>
<li>Illustration XX (<a idref="sect350">Section 350</a>)</li>
<li>Illustration XVIII (<a idref="sect320">Section 320</a>)</li>
<li>Illustration XIX (<a idref="sect334">Section 334</a>)</li>
<li>Illustration XX (<a idref="sect350">Section 350</a>)</li>