Tree-ring measurements of Picea mariana (Black spruce) from sample GUNISPMA-132
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Species PCMA; No of rings 61; Begin 1912; End 1972
物种:PCMA;年轮数:61;起始年份:1912;结束年份:1972

Species PCMA; No of rings 61; Begin 1912; End 1972
物种:PCMA;年轮数:61;起始年份:1912;结束年份:1972