TY  - BOOK
AU  - United Nations Economic Commission for Europe
AU  - United Nations Economic Commission for Europe
TI  - Efficient use of fertilizers in Agriculture. (Development in plant and Soil sciences 10)
U1  - 631.8/UNI 
PY  - 1983///
CY  - Hague
PB  - M. N. Pubs.
KW  - fertilizers
ER  -