Tree-ring measurements of Picea mariana (Black spruce) from sample MACKIPMA-91
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Species PCMA; No of rings 81; Begin 1853; End 1933
物种PCMA;年轮数:81;起始年份:1853;终止年份:1933

Species PCMA; No of rings 81; Begin 1853; End 1933
物种PCMA;年轮数:81;起始年份:1853;终止年份:1933