Haarlem Spaarne 108. Projectnummer dendrochronologie (Stichting RING): 1992037

Dendrochronological research project. The year in which the research stored in https://dataverse.nl/dataverse/stichtingring took place, from 1985 onwards can be found in the...树木年代学（Dendrochronological）研究项目。存储于https://dataverse.nl/dataverse/stichtingring中的该研究开展的年份（1985年及以后）可于……中查询到。