Douglas fir -- Economic aspects -- United States. / https://id.loc.gov/authorities/subjects/sh85039200 https://id.loc.gov/authorities/subjects/sh99005484 https://id.loc.gov/authorities/names/n78095330-781 : Brock, Emily K.,
2015
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Douglas fir -- United States -- History -- 20th century. / https://id.loc.gov/authorities/subjects/sh85039200 https://id.loc.gov/authorities/names/n78095330-781 https://id.loc.gov/authorities/subjects/sh2002006165 : Brock, Emily K.,