Tree-ring measurements of Picea mariana (Black spruce) from sample SCHEFPMA-21
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Species PCMA; No of rings 105; Begin 1884; End 1988
物种:PCMA;年轮数:105;起始年份:1884;结束年份:1988

Species PCMA; No of rings 105; Begin 1884; End 1988
物种:PCMA;年轮数:105;起始年份:1884;结束年份:1988