TY - RPRT T1 - Interim Progress Report Dendrochronology of Bristlecone Pine Y1 - 1968 A1 - Ferguson, C.W. KW - bristlecone pine KW - california KW - dendrochronology KW - NSF KW - pinus aristata KW - progress report KW - radiocarbon KW - white mountains PB - Laboratory of Tree-Ring Research CY - Tucson ER -