TY  - BOOK
AU  - Earl A. Helgeson
AU  -  FAO fo the U.N, 
TI  - Methods of weed control
U1  - 632.954 
PY  - 1957///
CY  - Rome
PB  - Food and Agriculture Oganization
N1  - Earl A. Helgeson & FAO fo the U.N: Methods of weed control.  Rome.  Food and Agriculture Oganization, 1957.--(632.954HEL)
ER  -