TY  - BOOK
AU  - FREDERICK R.TROEH; ARTHUR HOBBS (J); ROY L.DONAHUE
TI  - Soil and Water conservation
SN  - 0-13-622200-5
U1  - J:1(DT2)             N9 
PY  - 1999///
KW  - Soil & Water Conservation
ER  -