Kern, Frank Dunn. <br/><br/>
A revised taxonomic account of Gymnosporan gium 

 - University Park :  Pennsylvania State University,  1973 
 - 134 p. 
<br/><br/><label>LCCN: </label>27482 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Gymnosporangium.
<br/><br/><label>Dewey Class. No.: </label>589.225  / K4