Tree-ring width of Quercus species from historical object sample 5613B/02A, N...
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Species: Quercus species; No of rings: 20; Age not determined; Pith: not applicable; Heartwood: absent; Sapwood: absent; Number of sapwood rings: 0; Last ring under bark: absent
物种：栎属（Quercus）物种；年轮数：20；年龄未测定；髓：不适用；心材：缺失；边材：缺失；边材年轮数：0；树皮下最后一轮年轮：缺失
