Tree-ring measurements of Picea mariana (Black spruce) from sample GUNISPMA-31
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Species PCMA; No of rings 75; Begin 1914; End 1988
物种:PCMA;环数:75;起始年份:1914;结束年份:1988

Species PCMA; No of rings 75; Begin 1914; End 1988
物种:PCMA;环数:75;起始年份:1914;结束年份:1988