Tree-ring measurements of Picea mariana (Black spruce) from sample WILLOPLA-11
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Species PCMA; No of rings 137; Begin 1852; End 1988
物种PCMA(Species PCMA);环数137;起始年份1852;终止年份1988

Species PCMA; No of rings 137; Begin 1852; End 1988
物种PCMA(Species PCMA);环数137;起始年份1852;终止年份1988