A2Acollection via https://opendata.archieven.nl/dataset/41E2D26BB31D4AF7970085DA27B17F71
NNA Obdam 134, notaris Henrich Bernardus Gottmer, 1910 mei-juli
Westfries Archief, Hoorn, NNA Obdam 134, notaris Henrich Bernardus Gottmer, 1910 mei-juli, NNA Obdam 134, notaris Henrich Bernardus Gottmer, 1910 mei-juli, 134