TY  - BOOK
AU  - Hodgson,Jesse M.
TI  - Canada thistle and its control
T2  - United States. Dept. of Agriculture. Leaflet
AV  - S21 .A483 no. 523
PY  - 1968///]
CY  - Washington
PB  - U.S. Govt.Print. Off.
KW  - Canada thistle
KW  - Cirsium arvense
ER  -