TY - RPRT TI - Low-frequency signals in long tree-ring chronologies for reconstructing past temperature variability. AU - Jan Esper AU - Edward R Cook AU - Fritz H Schweingruber PY - 2002 DO - 10.1126/science.1066208 UR - https://pubmed.ncbi.nlm.nih.gov/11910106/ ID - 11910106 ER -