f="articles/old_vignettes/Using_the_contact_package_v1.2.0.html">Using the contact package</a>
    </li>
    <li>
      <a href="articles/old_vignettes/Using_the_contact_package_v1_2_1.html">Using the contact package</a>
    </li>
    <li>
      <a href="articles/old_vignettes/Using_the_contact_package_v1_2_2.html">Using the contact package</a>
    </li>
    <li>
      <a href="articles/old_vignettes/Using_the_contact_package_v1_2_3.html">Using the contact package</a>
    </li>
    <li>
      <a href="artic