Tree-ring width of Quercus species from historical object sample 5480B/07B, Netherlands, Zutphen

Species: Quercus species; No of rings: 99; first year: 1173; end year: 1272; Pith: not applicable; Heartwood: absent; Sapwood: absent; Number of sapwood rings: 0; Last ring under bark: absent物种：栎属（Quercus species）；年轮数量：99；起始年份：1173年；终止年份：1272年；髓心：不适用；心材：不存在；边材：不存在；边材年轮数量：0；树皮下的最后一年轮：不存在