TY  - BOOK
AU  - Williams,Moyle S.
AU  - Counston,John W.
TI  - Crop production levels and fertilizer use
PY  - 1962///
CY  - Rome
PB  - Food and Agriculture Organization of the United Nations
KW  - Fertilizers
KW  - Crop yields
KW  - Economic aspects
KW  - Developing countries
N1  - Includes bibliography
ER  -