1. Aamodt, O. S. 1934. The relation between physiologic forms of phytopathogenic fungi and the problem of breeding for resistance to disease. 5th Pac. Sci. Congr., Proc.4: 2615–2625.
2. Anon. 1944. Application of genetics to plant and animal breeding. Nature153: 780–783.
3. — 1949. Disease-resistant Buisman elm available. Am. Nurseryman89(5): 30.
4. Baker, W. L., and May, Curtis. 1951. Phloem necrosis of elm. Plants & Gardens7: 129–130.
5. Baxter, D. V. 1951. Pathology in forest practice.