Lawrence, George Hill Mathewson,  1910-. <br/><br/>
An introduction to plant taxonomy. / 
Illus. by Marion Ruff Sheehan. 
 - New York :  Macmillan,  c1955. 
 - 179 p. :  illus. ;  22 cm. 
<br/><br/><label>LCCN: </label>55000879 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plants--North America--Classification.
<br/><br/><label>LC Class. No.: </label>QK95  / .L3 
<br/><br/><label>Dewey Class. No.: </label>580.12