@misc{preler2009twoq, author={Erhard {Pre{\ss}ler}}, title={{Tree-ring width of Quercus species from historical object sample 6238B/04A, Netherlands, Groningen}}, year={2009}, doi={10.1594/PANGAEA.146277}, url={https://doi.org/10.1594/PANGAEA.146277}, organization={Pre{\ss}ler GmbH - Planung und Bauforschung, Gersten/Germany}, type={data set}, publisher={PANGAEA} }