International Seed Testing Association <br/><br/>
Handbook of Pure Seed Definitions (Excluding Forest Tree Seeds) 

 - 2nd Ed 
 - Zurich  International Seed Testing Association  1987 
 - 59p 
<br/><br/><br/>ENGLISH 
<br/><br/><label>ISBN: </label>3-906549-07-0 
<br/><br/><label>Dewey Class. No.: </label>631.521  / ISTA