Vleuten de Meern LR 39, Romeinse wachttoren. Projectnummer dendrochronologie ...

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...树轮年代学（Dendrochronology）研究项目。存储于https://dataverse.nl/dataverse/stichtingring的该研究的实施年份（1985年及以后）可在……中查阅。