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- douglas fir; oregon pine; pseudotsuga taxifolia brit.; pseudtsuga menziessi franco
- douglas fir; oregon pine; pseudotsuga taxifolia brit.; pseudtsuga menziessi (mirb.) franco
- douglas fir (pine, or spruce)
- douglas fir pole
- douglas, gavin
- douglas, (george) norman
- douglas hemlock
- douglas-home
- douglas-home, sir alexander
- douglas-home, sir alexander frederick
- douglas hurd
- douglasism
- douglasite
- douglas,james,2nd earl,of
- douglas, keith
- douglas, keith (castellain)
- douglas, lewis williams
- douglas' ligament
- douglas m.
- douglas, michael k(irk)
- douglas mt.
- douglas, nigel
- douglas-peucker algorithm
- douglas pine
- douglas ra.
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