Literature Cited
1. Institut fur Obstbau, Berlin. Die Walnusz veredlung. (Vegetative propagation of walnuts). Merkbl. Inst. Obstb. Berlin 5, pp. 15, 1936.
2. Lounsberry, C. C. Use of Growth Substance in Bench Grafting Walnuts and Hickories. Northern Nut Growers Association 1938 Report, p. 63.
3. Nelson, Julius. Fermentation and Germ Life. N. J. Ag. Exp. Sta. Bul. 134, 1899.
4. Witt, A. W. and Howard Spence. Vegetative Propagation of Walnuts. Ann. Rep. East Malling Res. Station 1926-27.