@misc{schweingruber2007tmop, author={Fritz Hans {Schweingruber} and Friedrich {R\"{o}thlisberger}}, title={{Tree-ring measurements of Picea abies (Norway spruce) from sample GASI-51}}, year={2007}, doi={10.1594/PANGAEA.591895}, url={https://doi.org/10.1594/PANGAEA.591895}, organization={Swiss Federal Institute for Forest, Snow and Landscape Research}, type={data set}, publisher={PANGAEA} }