TY  - BOOK
AU  - Stevenson, F.J.
TI  - Cycles of soil; Carbon, Nitrogen, Phosphorus, Sulfur micronutrients
U1  - 631.461.1/.5 M6 
PY  - 1986///
CY  - New York
PB  - John Wiley & Sons
KW  - F.J. Stevenson
KW  - Soil science,Micronutrients
ER  -