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Mexican whorled milkweed (Asclepias mexicana as a poisonous plant
Mexican whorled milkweed as a poisonous plant
16 pages, 2 pages of plates : illustrations, 1 map ; 24 cm.
"Contribution from the Bureau of Animal Industry."
Mexican whorled milkweed (Asclepias mexicana) as a poisonous plant
Washington, D.C. : U.S. Dept. of Agriculture, 1921
Bulletin (United States. Dept. of Agriculture) ; no. 969