Author:Carl Frederik Albert Christensen
Danish systematic botanist.
Works edit
- Index Filicum. 744 s. (1905–06)
- Index Filicum Supplementum I-III (1913–17).
- Den danske botaniks historie med tilhørende Bibliografi. København, H. Hagerups Forlag. Three vols. 680 s. (1924-1926)
Some or all works by this author are in the public domain in the United States because they were published before January 1, 1929.
This author died in 1942, so works by this author are in the public domain in countries and areas where the copyright term is the author's life plus 81 years or less. These works may be in the public domain in countries and areas with longer native copyright terms that apply the rule of the shorter term to foreign works.
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