Christensen, Carl, 1872-1942 <br/><br/>
Taxonomic Fern-studies 

 - København  H. Hagerups Boghandel  1937 
 - 73 p.  il., láms. ; 25 cm. 
 - Dansk botanisk Arkiv .
<br/><br/> Contenido: III. Revision of the genera and species of ferns / A. J. Cavanilles -- IV. Revision of the Bornean and New Guinean ferns / O. Beccari ; V. Cesati and J. G. Baker -- V. Descriptions of 36 news species of ferns 
<br/><br/><label>Subjects--Topical Terms: </label><br/>DESCRIPCION<br/>PTERIDOPHYTA<br/>HELECHOS<br/>TAXONOMIA