Cunningham, G.H. 1922: Leaf-rust, Puccinia pruni-spinosae Pers. Its appearance, cause, and control. New Zealand Journal of Agriculture 25: 271-277.
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| Cunningham, G.H. 1922: Leaf-rust, Puccinia pruni-spinosae Pers. Its appearance, cause, and control. New Zealand Journal of Agriculture 25: 271-277. |