>
      <p style="font-family: monospace;" class="MsoPlainText">&nbsp;</p>
      <div style="margin-left: 40px;"><span style="font-family:
          monospace;">Michael B. Porter, ``The Time-Marched FFP for
          Modeling Acoustic Pulse Propagation,'' <span
            style="font-style: italic;">J. Acoust. Soc. Amer.</span> <span
            style="font-weight: bold;">87</span>, 2013--2023 (1990).</span><br>
      </div>
      <p style="font-family: monospace;" class="MsoPlainText"><br>
        &nbsp;<