Davis, R. M. (1997). Compendium of lettuce diseases. APS.
Tohutoru Kātū Chicago (17th ed.)Davis, R. Michael. Compendium of Lettuce Diseases. Minneapolis: APS, 1997.
Tohutoro MLA (9th ed.)Davis, R. Michael. Compendium of Lettuce Diseases. APS, 1997.
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