Hunters, back packers, campers
Subtitle: the hay and straw you bring with your horses may have a poisonous hitchhiker
By: Oregon Department of Agriculture.
Contributors: Oregon. Noxious Weed Control Program.
Series: Bulletin / Noxious Weed Control Program -- no. [4]; Bulletin (Oregon. Noxious Weed Control Program) -- no. 4.
Publisher: The Dept.
Published: 1979
Place of publication: [Salem, Or.]
Language: eng
Subjects: Tansy ragwort -- Oregon.; Weeds -- Biological control -- Oregon.
Other titles: Poisonous hitchhiker.
Notes: Caption title.