Harshberger John W <br/><br/>
Phytogeographic survey of North America 

 - 2 
 -  1958 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Biogeography
<br/><br/><label>Dewey Class. No.: </label>U35:71, J8