Books by Walker, J. C.
Onion diseases and their control
Yellows-resistant cabbage varieties in the Danish Ballhead-Hollander group
Yellows-resistant varieties of cabbage in the early and midseason roundhead groups
Cabbage-seed treatment
Observations on the cultivation and diseases of cabbage and onions in Europe, 1922
Seed treatment and rainfall in relation to the control of cabbage black-leg