Journal article reprint from: Plant Disease Reporter, v.43:no.12 (1959:Dec.15).
Journal article reprint from: Plant Disease Reporter, 1959:Apr.15.
Journal article reprint from: Plant Disease Reporter, v.39:no.4 (1955:Apr.15).
Journal article reprint from: Plant Disease Reporter, v.38:no.4 (1954:Apr.15).