Tree-ring measurements of Picea mariana (Black spruce) from sample WILLOPLA-42
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Species PCMA; No of rings 136; Begin 1853; End 1988
物种PCMA;环数:136;起始年份:1853;终止年份:1988

Species PCMA; No of rings 136; Begin 1853; End 1988
物种PCMA;环数:136;起始年份:1853;终止年份:1988