Robert F. Nichols No description specified. 1-4 (4 Records) Documents The Dendrochronolgy of the Wetherill Mesa Archeological Project (Tree-Ring Bulletin Vol. 28 Nos. 1-4). (1967) Dendrochronology of the Wetherill Mesa Archeological Project (1967) Evidence of Prehistoric Cultivation of Douglas-Fir Trees at Mesa Verde Large Hewn Plank from Mesa Verde, Colorado