Ryder, Edward J.,  1929- <br/><br/>
Evaluation of lettuce varieties and breeding lines for resistance to common lettuce mosaic 
[by Edward J. Ryder. 
 - Washington]  U.S. Agricultural Research Service  [1968] 
 - 8 p.  illus.  24 cm. 
 - United States. Dept. of Agriculture. Technical bulletin ;  no. 1391 .
 - Technical bulletin (United States. Department of Agriculture) ;  no. 1391. .
<br/><br/>Bibliography: p. 2. 
<br/><br/><label>LCCN: </label>agr68000163  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Lettuce--Varieties.<br/>Lettuce mosaic disease.
<br/><br/><label>LC Class. No.: </label>S21  / .A72 no. 1391 
<br/><br/><label>Dewey Class. No.: </label>633.5/2/7 
<br/><br/><label>National Agricultural Library Call No.: </label>1Ag84Te no. 1391