Fehr Walter R <br/><br/>
Principle of cultivar development. 
Fehr Walter R 
 - New York     MacMillan Publishing       1987 
<br/><br/><label>Standard No.: </label>27819 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>J3 : 5, M7.1-.2