https://scholars.uky.edu/en/publications/throughfall-chemistry-in-engelmann-spruce-subalpine-fir-forest-in/fingerprints/
Throughfall chemistry in Engelmann spruce - subalpine fir forest in north central Colorado -...
engelmann sprucenorth centralchemistry
https://www.usgs.gov/media/images/cross-section-engelmann-spruce-fire-scars
Cross-section of an Engelmann Spruce with Fire Scars | U.S. Geological Survey
Figure 2. A partial cross-section from a live Engelmann spruce with three fire scars (1801, 1847, and 1880), indicating repeated, low-severity, moderate...
https://digitalcommons.usu.edu/etd_biology/154/
"The Use of Trap Trees for the Control of the Engelmann Spruce Beetle, " by David McComb
Several destructive outbreaks of the Engelmann spruce beetle in the Rocky Mountains have been reported since the turn of the century. A severe outbreak in the...
https://open.library.ubc.ca/soa/cIRcle/collections/ubctheses/831/items/1.0103818
Engelmann spruce and subalpine fir seed dispersal in the ESSF wet cold subzone - UBC Library Open...
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