00937cam a22002651 4500 agr68000163 DLC 20260227111030.0 711216s1968 dcua b 000 0 eng c agr68000163 U.S. Nat'l Agr. Libr. DLC DLC S21 .A72 no. 1391 1Ag84Te no. 1391 633.5/2/7 Ryder, Edward J., 1929- 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. $0.05 United States. Dept. of Agriculture. Technical bulletin ; no. 1391 Bibliography: p. 2. Lettuce Varieties. Lettuce mosaic disease. Technical bulletin (United States. Department of Agriculture) ; no. 1391. 12470 12470