Ostfriesisches Urkundenbuch (Band 1): 787 - 1470
Emden, 1878
DOI: https://doi.org/10.11588/diglit.1950
URN: urn:nbn:de:bsz:16-diglit-19507
Metadata: METS
IIIF Manifest: version 2.1, version 3.0