The agsm, dcu, jmr, jphysicsB and
kluwer bibliographic styles support a new bibliographic entry
field URL for specifying the URL of documents that are
available via the World Wide Web.
An example of this is the reference to Drakos's (1994)
documentation for his LATEX2HTML package in the file
harvard.bib that is enclosed with the source for this document.
When processed by LATEX2HTML documents using the harvard bibliographic
package will have hypertext links created from the citation within the text
to the reference list.
If an entry in the reference list has an URL field then a
hypertext link to the document will be created using the data in that field.