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Corkbark fir (Abies lasiocarpa var. arizonica) seed fall, 1993 - 2018
University of Arizona Red Squirrel Monitoring Program Corkbark fir (Abies lasiocarpa var. arizonica) seed fall, 1993 - 2018, University of Arizona Red Squirrel Monitoring Program study areas, Pinaleño Mountains, Graham County, Arizona.