TY  - BOOK
AU  - Symposium on the Utilization of Secondary and Trace Elements in Agriculture. Geneva, Palais des nations, Jan.12-16, 1987.
TI  - The utilization of secondary and trace elements in agriculture; proceedings
T2  - Developments in Plant and Soil Sciences
U1  - 631.416.9 1987.1.12/16 (082.2) M7 
PY  - 1987///
CY  - Dordrecht
PB  - Martinus Nijhoff
KW  - Trace elements
ER  -