Velsen I. Projectnummer dendrochronologie (Stichting RING): 1993041

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（Dendrochronology）研究项目。存储于https://dataverse.nl/dataverse/stichtingring中的该研究（其相关工作自1985年起开展）的实施年份，可在……中查询获取。