Walker, J. C <br/><br/>
Yellows-resistant verieties of cabbage in the early and midseason roundhead groups  / 
by J. C. Walker and J. P. Jolivette 
 - Washington  :   Department of Agriculture 
 - 20 p. 
 - EUA. Dept. of Agriculture Circular; 775 .
<br/><br/><label>LCCN: </label>202844 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Col -- Variedades