Hudson, Norman
Soil conservation - 3rd ed. - Ames Iowa State University Press 1995 - 391p. : ill., photos.
Index included
0813823722
SOIL CONSERVATION
SOILS-CONSERVATION
SOIL EROSION
SOILS-EROSION
631.4 / H8
Soil conservation - 3rd ed. - Ames Iowa State University Press 1995 - 391p. : ill., photos.
Index included
0813823722
SOIL CONSERVATION
SOILS-CONSERVATION
SOIL EROSION
SOILS-EROSION
631.4 / H8