TY  - BOOK
AU  - Bear,Firman E.
ED  - American Society of Agronomy.
ED  - National Fertilizer Association (1925- )
TI  - Hunger signs in crops: a symposium,
AV  - QK867 .A5 1949
U1  - 581.13082 
PY  - 1949///]
CY  - Washington
PB  - American Society of Agronomy and National Fertilizer Association
KW  - Deficiency diseases in plants
N1  - "Selected references" at end of each chapter except the first
ER  -