The sugar-beet leaf-spot disease and its control by direct measures /
Coons, G. H.
The sugar-beet leaf-spot disease and its control by direct measures / by G. H. Gons - Washington : Department of Agriculture - 20 p. - EUA. Dep. of Agr. Circular; 115 .
202683
Remolacha azucarera -- Enfermedades
The sugar-beet leaf-spot disease and its control by direct measures / by G. H. Gons - Washington : Department of Agriculture - 20 p. - EUA. Dep. of Agr. Circular; 115 .
202683
Remolacha azucarera -- Enfermedades