<p><strong>2011-2019</strong></p>
<p><strong><em>Edil Torres Rivera</em></strong></p>
<p>United States of America</p>
<p><strong>2003-2010</strong></p>
<p><strong><em>Silvia Helena Koller&nbsp;</em></strong></p>
<p>Brasil</p>
<p><strong>1998-2003</strong></p>
<p><strong><em>Irma Serrano-Garcia</em></strong></p>
<p>Puerto Rico</p>
<p><strong>1990-1998</strong></p>
<p><strong><em>José Miguel&nbsp;Salazar</em></strong></p>
<p>Venezuela</p>
<p><strong>1983-1989</strong></p>
<p><strong><em>Luis Laosa&nbsp;</em></strong></p>
<p>United States of America</p>
<p><strong>1977-1982</strong></p>
<p><strong><em>Gordon Finley</em></strong></p>
<p>United States of America</p>
<p><strong>1975-1976</strong></p>
<p><strong><em>Horacio Rimoldi</em></strong></p>
<p>Argentina</p>
<p><strong>1970-1975</strong></p>
<p><strong><em>Luis Natalicio</em></strong></p>
<p>United States of America</p>
<p><strong>1967-1970</strong></p>
<p><strong><em>Carl F. Hereford</em></strong></p>
<p>United States of America</p>