Tree-ring measurements of Picea mariana (Black spruce) from sample GUNISPMA-102
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Species PCMA; No of rings 78; Begin 1910; End 1987
物种PCMA;环数78;起始年份1910;终止年份1987

Species PCMA; No of rings 78; Begin 1910; End 1987
物种PCMA;环数78;起始年份1910;终止年份1987