I have long preferred "outside back cover" to indicate this location. It does not need to be explained, while "p. 4 of cover" does. "Page <whatever> of cover" is unnecessary, opaque catalogerese that can easily and happily be dispensed with, especially if our authority records come to have more public exposure.
From: Program for Cooperative Cataloging [mailto:[log in to unmask]] On Behalf Of Moore, Richard
Sent: Thursday, 03 May, 2012 02:09
To: [log in to unmask]
Subject: Re: [PCCLIST] back cover or p. 4 of cover
I would use any standard term or phrase that would be clear to somebody reading it. I don't think PCC has been fussed for a long time over the minutiae of whether participants cite "back cover", or "p.4 of cover"; "WWW site" "www site", web site" or "website", as long as it is concise and clear.