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A.E. Douglass LTRR films

Films are described at the item level by prefixes and titles assigned by the Laboratory of Tree-Ring Research, and arranged alphanumerically by prefix. Prefix designations are assigned by fields of study or subject matter, and are as follows: ARCH (archaeology), ASTR (astronomy), GEOL (geology), LTRR (Laboratory of Tree-Ring Research), MISC (miscellaneous).
Playlist Duration: 02:01:33

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