TY  - BOOK
AU  - R. Burnell Held
AU  -  Marion Clawson, 
TI  - Soil conservation in perspective
U1  - 631.45 
PY  - 1965///
CY  - Baltimore
PB  - Johns Hopkins Press
N1  - R. Burnell Held & Marion Clawson: Soil conservation in perspective.  Baltimore.  Johns Hopkins Press, 1965.--(631.45HEL)
ER  -