help for small special library

[Marlene Roy]

I manage a small research library at the International Institute for 
Sustainable Development in Canada (among many other things).  The collection 
of approximately 10,000 items  is accessed through a dos based program 
called NetISIS and available to everyone at the IISD through a LAN .    We 
also have a WWW home page.  I would like to make the library database 
available and searchable  through our WWW site as the collection is of 
interest to researchers from around the world.   Has anyone had any 
experience with this?  What kind of software would I need?  Any help/advice 
 would be appreciated.  Cost is always a consideration.

Note:  we use WINDOWS NT.  Will this be a problem?