Cody, William J. <br/><br/>
Ferns and fern allies of Canada 

 - Ottawa :  Minister of Supply and Services,  1989 
 - 430 p.  : ilus. ; mapas 
<br/><br/><label>LCCN: </label>51938 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Botánica--Canadá.<br/>Helechos--Canadá.
<br/><br/><label>Dewey Class. No.: </label>587.31  / C6