1) Control of the whorled milkweed in Colorado

Author
May, W. L
Series
Bulletin volume 285
Publisher
Colorado Experiment Station
Pub. Date
1923.
Language
English

2) Whorled milkweed: the worst stock-poisoning plant in Colorado

Author
May, W. L
Series
Bulletin volume 255
Publisher
Agricultural Experiment Station of the Agricultural College of Colorado
Pub. Date
1920.
Language
English