Christensen, Carl  1872-1942 <br/><br/>
Index Filicum: Supplementum I - III: 1906-1933 
Carl Christensen 
 - Dehra Dun  Germany  Bishen Singh Mahendra Pal Singh  Koeltz Scientific Books  1913 
 - 219p. 
<br/><br/><label>ISBN: </label>3874290492 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Index Filicum
<br/><br/><label>Subjects--Index Terms: </label>Ferns Fern 
<br/><br/><label>Dewey Class. No.: </label>587.3