Leeuwarden Oldehoofsterkerkhof, boerderij en waterputten. Projectnummer dendr...

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的该研究的实施年份信息，自1985年起可在……中查阅。