Copy cataloguing through Z39.50 is one of the most powerful Koha features. It runs parallel queries on one or more Z39.50 servers at your choice.
See the process in 4 pictures (in Italian, sorry)  or in the Koha manual .
On 08/giu/2013, at 14.20, Sweet, Charles Eugene wrote:
> Try the Z39.50 search in the Cataloguing module - often a title and author search will find a useful record (you can add other Z39.50 sources to the ones provided) and will overlay the record you have open. So I just open a blank record and run the search.
> -----Original Message-----
> From: Code for Libraries [mailto:[log in to unmask]] On Behalf Of Gary McGath
> Sent: Saturday, June 08, 2013 8:10 AM
> To: [log in to unmask]
> Subject: [CODE4LIB] Setting up Koha for a volunteer library
> An non-profit club I'm associated with is looking into using Koha to
> catalogue its in-house circulating library of several thousand books.
> Right now there's no catalogue, and the circulation system is a paper
> sign-out book. As the resident library techie, I figure I should help
> somehow, though my experience isn't with ILSs or OPACs.
> The obvious first question is how to get all those books into the system
> using volunteer labor. Koha imports MARC records. A barcode scanner to
> get ISBNs is an obvious start, but possibly half the books are pre-ISBN,
> so they'll have to be entered by hand. The Worldcat API
> (http://xisbn.worldcat.org/xisbnadmin/doc/api.htm#getmetadata) looks
> like the thing for getting metadata from the ISBN, and turning the XML
> into MARC won't be hard.
> I'm willing to write some code to help them along, but to the extent
> that there are free tools that work, it makes sense to do them. Can
> anyone with similar experience offer suggestions?
> Gary McGath, Professional Software Developer