TY  - BK
AU  - Troeh,F.R.
AU  - Donahue,R.L.
AU  - Hobbs,J.A.
TI  - Soil and water conservation:  Productivity and environmental protection
SN  - 0-136-22200-5
U1  - 631.45 
PY  - 1999///
CY  - New Jersey  (USA)
PB  - Prentice Hall, 
ER  -