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Bühl, G. 2020. Eastern or Western - that is the Question. Some Notes on the New Evidence concerning the Eastern Origin of the Halberstadt Diptych. Acta ad archaeologiam et artium historiam pertinentia. 15, 1 N.S. (Feb. 2020), 193–203. DOI:https://doi.org/10.5617/acta.5674.