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- 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.
- douglas, roy
- douglass
- douglas sbd
- douglas scale
- douglass, frederic
- douglass, frederick
- douglas's graft
- douglas, sir james
- douglass north
- douglas spruce
- douglas spruce--p.menziesii(mirb.)franco--pseudotsuga taxifolia brit.
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