Williams, Watkin <br/><br/>
Genetical principles and plant breeding / 
Watkin Williams 
 - Oxford :  Blackwell Scientific Publications,  1964 
 - 504 p. ;  ill. ;  23 cm. 
 - Botanical monographs ;  v.5 .
<br/><br/>p. 458-487 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Genetics<br/>Plant breeding