Deventer Lebuinuskerk, toren. Projectnummer dendrochronologie (Stichting RING): 2010502

Dendrochronological research project. D.J. de Vries and H. Tisje performed the research and produced the initial dating resuls. Digitization of the analog measurement series: Benno Ridderhof (VU, 2008); further additions, verification and reformatting: Esther Jansma (2011, 2022).本项目为树轮年代学（Dendrochronology）研究项目。D.J. de Vries与H. Tisje开展了此项研究，并生成了初始定年成果。模拟测量序列（analog measurement series）的数字化工作由Benno Ridderhof（VU，2008年）完成；后续的序列补充、校验与格式重整工作由Esther Jansma分别于2011年、2022年完成。