Tree-ring measurements of Picea mariana (Black spruce) from sample GUNISPMA-52
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Species PCMA; No of rings 90; Begin 1899; End 1988
物种PCMA;年轮数目:90;起始年份:1899;终止年份:1988

Species PCMA; No of rings 90; Begin 1899; End 1988
物种PCMA;年轮数目:90;起始年份:1899;终止年份:1988