Biblio
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Margolis, Ellis Quinn_Stand Replacing Fire History and Aspen Ecology in the Upper Rio Grande Basin_2003.pdf (64.47 MB). 1999. “Tree-Ring Reconstruction Of Western Spruce Budworm Outbreaks In The Rio Grande National Forest, Colorado”. School Of Renewable Natural Resources. School Of Renewable Natural Resources. Tucson: University of Arizona.
Ryerson, Daniel Eric_Tree-Ring Reconstruction of Western Spruce Budworm Outbreaks in the Rio Grande National Forest, Colorado_1999.pdf (5.59 MB). 1971. Tucson: University of Arizona.
Robinson, William, Warren, Richard_Tree-Ring Dates from New Mexico C-D Northern Rio Grande Area_1971.pdf (44.28 MB)