[64] Atkinson, Geo. F. Studies of Some Shade Tree and Timber Destroying Fungi, Cor. Agl. Exp. Sta. Bul. 193:208-214. 1901. Schrenk, H. von. Div. Veg. Phys. and Path., U. S. Dept. Agl. 25:40-52, Pls. 11 (in part), 13. 1900.
[65] Wilcox, E. M. A Rhizomorphic Root-Rot of Fruit Trees, Okla. Agr. Exp. Sta. Bul. 49:1-32, Pls. 1-11. 1901.
[66] Duggar, B. M. Fungous Diseases of Plants 473. 1909.
[67] Hedrick, U. P. Gumming of the Prune Tree, Ore. Sta. Bul. 45:68-72. 1897.
[68] Slingerland, M. V. Bul. Cor. Ag. Ex. Sta. 172: 1899.
[69] Riley, C. V. An. Rpt. State Entom. Mo. 1:50-56. 1869; 3:11-29. 1871.
[70] Marlatt, C. L. The San José or Chinese Scale, U. S. D. A. Bur. Ent. Bul. 62:1-89. 1906.
[71] Lowe, V. H. The New York Plum Lecanium, N. Y. Sta. Bul. 136:583. 1897.
[72] Beutenmüller, W. Sesiidae of America, etc. 266-271. 1901.
[73] Ibid. 291-292. 1901.