@misc{schweingruber2007tmop, author={Fritz Hans {Schweingruber} and Margrit {Brunner}}, title={{Tree-ring measurements of Picea glauca (White spruce) from sample WATSON-31}}, year={2007}, doi={10.1594/PANGAEA.600229}, url={https://doi.org/10.1594/PANGAEA.600229}, organization={Swiss Federal Institute for Forest, Snow and Landscape Research}, type={data set}, publisher={PANGAEA} }