Tree-ring measurements of Picea mariana (Black spruce) from sample GUNISPMA-131
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Species PCMA; No of rings 81; Begin 1908; End 1988
物种PCMA;环数:81;起始年份:1908;结束年份:1988

Species PCMA; No of rings 81; Begin 1908; End 1988
物种PCMA;环数:81;起始年份:1908;结束年份:1988