TY  - BOOK
AU  - Donald R. Nielsen
AU  -  J. G. MacDonald, 
TI  - Nitrogen in the environment. Vol 2 Soil-plant-nitrogen relationships 
SN  - 0-12-518402-6
U1  - 589.95 
PY  - 1978///
CY  - New York
PB  - Academic Press
N1  - Donald R. Nielsen & J. G. MacDonald: Nitrogen in the environment. Vol 2 Soil-plant-nitrogen relationships.  New York.  Academic Press, 1978. 0-12-518402-6--(589.95NIE)
ER  -