@Book{13582995X,
author="Blok, Petrus J.
and Feith, J. A.",
title="Oorkondenboek van Groningen en Drente",
year="1896",
month="1899",
publisher="Wolters",
address="Groningen",
note="bew. door Petrus Johannes Blok, Johan Adriaan Feith ...",
language="Dutch"
}