Soil conservation in perspective
R. Burnell Held
Soil conservation in perspective - Baltimore Johns Hopkins Press 1965 - 344p
R. Burnell Held & Marion Clawson: Soil conservation in perspective. Baltimore. Johns Hopkins Press, 1965.--(631.45HEL)
ENGLISH
631.45 / HEL
Soil conservation in perspective - Baltimore Johns Hopkins Press 1965 - 344p
R. Burnell Held & Marion Clawson: Soil conservation in perspective. Baltimore. Johns Hopkins Press, 1965.--(631.45HEL)
ENGLISH
631.45 / HEL
