Overstruck Seals in the Dumbarton Oaks Collection https://www.doaks.org/resources/seals/seals-bibliography/nesbitt1990 https://www.doaks.org/@@site-logo/news-logo.png J. W Nesbitt (1990) Overstruck Seals in the Dumbarton Oaks Collection Studies in Byzantine Sigillography, 2:67-93. Keywords Bibliography, Byzantine seals URL http://www.worldcat.org/oclc/32912165