Lawrence, George Hill Mathewson. <br/><br/>
Taxonomy of vascular plants 

 - New York :  MacMillan,  1951 
 - 823 p.  : ilus. 
<br/><br/> 6th. Print. 1962  8th. Print. 1963  9th. Print. 1964 
<br/><br/><label>LCCN: </label>28769 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Botánica--Clasificación.
<br/><br/><label>Dewey Class. No.: </label>580.12  / L38