Hudson, Norman.
Soil conservation / Norman Hudson. - 2nd ed. - Ithaca, NY : Cornell University Press, 1981. - 324 p. : ill. ; 23 cm.
Soil conservation.
Soil erosion.
631.45
Soil conservation / Norman Hudson. - 2nd ed. - Ithaca, NY : Cornell University Press, 1981. - 324 p. : ill. ; 23 cm.
Soil conservation.
Soil erosion.
631.45