Billeder af Nordens flora,.
København,G.E.C. Gad,1901-1903 [i.e. 1907].
biodiversitylibrary.org/page/10459925
København,G.E.C. Gad,1901-1903 [i.e. 1907].
biodiversitylibrary.org/page/10459925
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via Flickr https://flic.kr/p/2c52wMh