TY  - GEN
AU  - 
AU  - Nielsen, Donald R. and MacDonald, J. G., ed.
AU  - MacDonald, J. G. and Nielsen, Donald R., ed.
TI  - Nitrogen in the environment
SN  - 0125184018
PY  - 1978///
CY  - New York
PB  - Academic Press
KW  - Nitrogen Cycle
KW  - Nitrogen
KW  - Environment
KW  - Soil
N1  - Vol. 1 : Nitrogen behaviour in field soil
ER  -