TY  - BOOK
AU  - Helgeson, Earl A.
TI  - Methods of Weed Control
U1  - 632.954 
PY  - 1957///
CY  - Rome
PB  - Food and Agriculture Organization of the United Nations
KW  - Agriculture and related technologies
KW  - Technology (Applied sciences)
KW  - Control
KW  - Weeds
ER  -