- From the Publisher via CrossRef (no proxy)
- d-scholarship.pitt.edu
(no proxy)
- d-scholarship.pitt.edu [2]
(no proxy)
- d-scholarship.pitt.edu [3]
(no proxy)
- jstor.org (no proxy)
- pdcnet.org (no proxy)
- pdcnet.org [2] (no proxy)
- pitt.edu
(no proxy)
- tandfonline.com (no proxy)
- tandfonline.com [2] (no proxy)
- cambridge.org (no proxy)