Norm's stylesheets: phone and fax in address in author

The following fragment renders (using the print stylesheets) both
phone and fax number on the titlepage, but does not print "phone" or
"fax", so the reader doesn't know which one is the fax number.
Shouldn't be printed "Phone:" and "Fax:" respectively?  Just a note,
in Germen say "Telefon" and "Telefax".

<book>
  <title>My title</title>

  <bookinfo>
    <subtitle>my subtitle</subtitle>

    <author>
      <firstname>Jochen</firstname>
      <surname>Hein</surname>
      <authorblurb>
	<para>
          Jochen is working as a systems consultant at Dierichs
          Kommerzielle Dienste in Kassel, Germany.  He works with SAP
          R/3 under AIX, Reliant Unix and Windows NT, his prior
          experience contains about ten years R/2 management.
        </para>
      </authorblurb>
      <affiliation>
	<address>
          <street>Frankenstra絽 33</street>
          <postcode>34131</postcode> <city>Kassel</city>
          <country>Germany</country>
          <phone>+49 (0) 561 / 93 24 626</phone>
          <fax>+49 (5) 561 / 93 24 663</fax>
          <email></email>
        </address>
      </affiliation>
    </author>
...

Jochen

-- 
Nicht weil die Dinge schwierig sind, wagen wir sie nicht,
sondern weil wir sie nicht wagen, sind sie schwierig.