na INLIS000000000017279 20230701092351 0010-1118017279 230701 g 1 eng Taxonomic fern-studies I-II / Carl Christensen CHRISTENSEN, Carl 99 p. : ill. ; 24 cm. 582.35 582.35 CHR t Kobenhavn : H. Hagerups, 1929 Reprinted from Dansk Botanisk Arkiv 6(3), 1929: 1-99. FERNS mfn-19109