TY  - BOOK
AU  - Barber, Stanley A
TI  - Soil nutrient bioavailability
SN  - 0471090328
U1  - 631.41/BAR 
PY  - 1984///
CY  - New York
PB  - John Wiley & Sons
KW  - Crops--Nutrition--Mathematical models
KW  - Soil fertility--Mathematical models
ER  -