A2Acollection via https://opendata.archieven.nl/dataset/400A824C18EB447CBB10F66E63BDCA36
NNA Hoorn 137, notaris Hinno Willem Jan Sannes, 1893 mei-juni
Westfries Archief, Hoorn, NNA Hoorn 137, notaris Hinno Willem Jan Sannes, 1893 mei-juni, NNA Hoorn 137, notaris Hinno Willem Jan Sannes, 1893 mei-juni, 137