TY  - BOOK
AU  - A Symposium
TI  - Hunger Signs in Crops
U1  - 631.8 
PY  - 1949///
CY  - Washington
PB  - The American Society of Agrionomy
KW  - Agriculture and related technologies
KW  - Technology (Applied sciences)
KW  - Fertilizers
KW  - Soil fertility
ER  -