Tree-ring chronology of Picea mariana (Black spruce) compiled from tree samples SCHEFPMA
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Species PCMA; No of trees 12; No samples 23; No of years 148; Begin 1841; End 1988; Creation date 1997-01-01
创建时间：
2007-01-01
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Species PCMA; No of trees 12; No samples 23; No of years 148; Begin 1841; End 1988; Creation date 1997-01-01