Subject
- Conifers -- West (U.S.) -- Ecology2
- Forest ecology -- West (U.S.)2
- Forests and forestry -- Northwest, Pacific2
- Forests and forestry -- Research -- Northwest, Pacific2
- Lake ecology -- West (U.S.)2
- Pacific Northwest Forest and Range Experiment Station (Portland, Or.)2
- Stream ecology -- West (U.S.)2
- Alfalfa -- Diseases and pests -- Oregon1
- Amphibians -- Habitat -- Oregon -- Willamette River Watershed1
- Amphibians -- Oregon -- Willamette River Watershed -- Geographical distribution1
- Archaeology -- Mexico -- Baja California (Peninsula)1
- Baja California (Mexico : Peninsula) -- Antiquities1
- Beagle (Or.) -- History1
- Boletaceae -- Classification1
- Boletaceae -- Molecular genetics1
- Camp White1
- Coffee -- Breeding1
- Coffee -- Embryology1
- Coffee -- Propagation -- In vitro1
- Computer scheduling1