books.google.com - In volume 2 of this series, Part I examines Phocas and Heraclius (602-641) and Part II covers the period between Heraclius Constantine to Theodosius III (602-717)....http://books.google.com/books/about/Catalogue_of_the_Byzantine_Coins_in_the.html?hl=uk&id=l97WJwbuAWsC&utm_source=gb-gplus-shareCatalogue of the Byzantine Coins in the Dumbarton Oaks Collection and in the Whittemore Collection