American fern journal 

 - Washington :  American Fern Society Botany Department,  1981 
<br/><br/> UKM: v.71 (1981)- 
<br/><br/><label>ISSN: </label>0002-8444 
 = American fern journal American fern journal 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Pteridophyta--Periodicals