Recently we have converted/migrated Bound Volume (Journals) data from Libsys Library management software to Koha successfully and Volume/issues details has been also retained as it is along with other details. The migrated data can be viewed at below link:
Bound Volumes Converted Data of BP Central Library, NITR
by 
Dear Vinod Kumar Mishra
Congrats!. We are in the process of exporting Bound Volumes and Journals from LibSys to Koha. If you could help us by revealing the steps you have gone through in this process. That would be very helpful for our movement for open source.
Regards
Biju R
Assistant Librarian,
IIM Kozhikode
biju@iimk.ac.in
Sorry for delay in reply, Please follow the link http://itshelp.co.in/2014/11/data-conversion-book-and-journals-from-libsys-to-excelmarc/ .
However i used excel formula and some logic to convert Bound Volumes in bringing same titles together.