. . "sol." . . . . . . . . . . . . . . . . . . . "Soils: their properties, improvement, management, and the problems of crop growing and crop feeding"@en . . "Soils: their properties, improvement, management, and the problems of crop growing and crop feeding ... Illustrated"@en . "Soils, their properties, improvement, management and the problems of crop growing and crop feeding, by Charles William Burkett" . . "Soils; their properties, improvement, management, and the problems of crop growing and crop feeding" . "Soils; their properties, improvement, management, and the problems of crop growing and crop feeding"@en . "Soils: their properties, improvement, management, and the problems of crop growing and crop feeding. Illustrated"@en . . . "Soils their properties, improvement, management, and the problems of crop growing and crop feeding"@en . . . . . "Soils : their properties, improvement, management, and the problems of crop growing and crop feeding"@en . "Soils : their properties, improvement, management, and the problems of crop growing and crop feeding" . . . . . . . . . "Sòls Fertilitat." . . "Soils." . . "Sòls Descripció." . .