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In 1859, the German-American Jacob Kuechler (1823–1893) used crossdating to examine oaks (Quercus stellata) in order to study the record of climate in western Texas.
During the first half of the 20th century, the astronomer A. Douglass founded the Laboratory of Tree-Ring Research at the University of Arizona.
Most NADB-R records consist of a document citation and other metadata but do not have the documents themselves uploaded.
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Local information about the archaeology of North Yorkshire can be found in the historic environment record, which records information about historic sites and monuments.