TY  - BOOK
AU  - Food and Agriculture Organization of the United Nations,
TI  - Maximizing the Efficiency of Fertilizer Use by Grain Crops
SN  - 9251009546
U1  - 631.81026 
PY  - 1980///
CY  - Rome
PB  - F. A. O.
KW  - Grain Crops
ER  -