https://pure.psu.edu/en/publications/klamath-mountains-bioregion/
Klamath Mountains bioregion - Penn State
klamath mountainsbioregionpennstate
https://digitalcollections.library.oregon.gov/nodes/view/45114
4.5 Klamath Mountains Oregon state of the environment report 2000 | State Library of Oregon Digital...
Date: 2000 | Collection: Business Development | Publication Set: Oregon state of the environment report 2000 | Read the full record details for State...
state of the environment
https://extension.oregonstate.edu/news/multiple-stressors-drive-douglas-fir-decline-klamath-mountains
Multiple stressors drive Douglas-fir decline in the Klamath Mountains | OSU Extension Service
Dec 19, 2025 - OSU study finds Douglas-fir in Klamath Mountains in decline; risk tool helps landowners.