Zürich, Beer & Co., 1921. 8°. 4 n.n. Bl., 232 S Miit einem gefalteten Plan. Originalpappband.
Rücken gebräunt.
1894 82 p., 16 figures, 2 plates, boards.Thesis. Ex library F. Verdoorn (with his library stamps). Except for the stamps a very well preserved copy.Frans Verdoorn (1906-1984) was a Dutch botanist specialized in Bryophytes, publisher, and a scientist who coined the term biohistory.