Librarians who manage their institution’s repository should not approach the publisher directly, but rather approach the authors within their institutions. The authors of Articles published in Berghahn journals can provide their final, pre-print version of their Articles for posting once any embargo period has passed. The institutional repository record should provide an acknowledgement along the following lines together with a link to the publisher's site:
"This is a post-peer-review, pre-copyedited version of an article published in [insert journal title]. The definitive publisher-authenticated version [insert complete citation information here] is available online at: [insert URL here]"