TY  - BOOK
ED  - Soil Scientists Of The National Agricultural Advisory Service
TI  - Nitrogen and soil organic matter  
PY  - 1969///
CY  - London
PB  - Her Majestry Stationery Office
KW  - Nitrogen FertilizersNitrogenSoil Sciences
N1  - Proceedings of a conference � Agricultural Advisory Service
ER  -