TY  - BOOK
AU  - Beek,J.
AU  - Frissel,M.J.
TI  - Simulation of nitrogen behaviour in soils
U1  - 631.4 
PY  - 1973///
CY  - Wageningen
PB  - Centre for Agri. Pub. and Documentation.
KW  - Nitrogen Behaviour in Soil
KW  - Soil Fertility
KW  - Soil Science
ER  -