🚀 go-pugleaf

Here are two entry problems that are awkward within endnote - suggestions for
best strategy much appreciated.
1) Multiple publishers
"Published for the I.A.I by OUP" is ok. Unfortunately I.A.I. now have a new
arrangement.
The books now say " Published for the I.A.I. by Edinburgh University Press and
the Smithsonian Institution" so place of publication is E'burgh and Washington
DC   - how to link multiple publishers with multiple places of publication?
2) Exhibition catalogues - they are a nightmare - (Sorry I'm new to the nuseum
world and dont know the conventions) often lacking authors or saying things
such as 
Edited by blah with contributions by blah2 blah3 and blah4

and the only publication details being a list of places where the travelling
shows go to...
what shoudl I do?
I look forward to some interesting responses
David Zeitlyn