Baxter, Doris, <br/><br/>
Seed Purity and Taxonomy : 

 -  MSU Press,  2008. 
 - 750 pages 
<br/><br/><label>ISBN: </label>9780870138225 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science.
<br/><br/><label>Dewey Class. No.: </label>631.521  / BAX