Books by Humphrey, H. B.
Makers of North American botany
Makers of North Anerican botan
Makers of North Anerican botany
Diseases of plants in the United States in 1933
The rusts of cereal crops
Project reports, progress of barberry eradication, 1923
Progress of barberry eradication, 1922
Studies on the relation of cer
Studies on the relation of certain species of Fusarium to the tomato blight of the Pacific Northwest
The preventing of the stinking
The preventing of the stinking smut of wheat