12. Haseman, L. The Walnut Caterpillar. Missouri Exp. Sta. Bul.
418.
13. Talbert, T. J. Nut Tree Culture in Missouri. Mo. Exp. Sta.
Bul. 454. May be had from Agr. Exp. Station, Columbia, Mo.
14. Schuster, C. E. Filberts. Oregon State College Ext. Bul. 628.
May be had from Oregon State College, Corvallis, Oregon.
15. Schwartze, C. D. Filbert Culture. Washington State Col. Ext.
Bul. 263. May be had from Extension Service, Washington State
College, Pullman, Wash.
16. Sherman, L. W. and Ellenwood, G. W. Topworking and
Bench-grafting Walnut Trees. Special Circ. 69. May be had from
Agr. Exper. Sta., Wooster, Ohio.
17. Slate, G. L. Filberts. N. Y. State Agr. Exp. Sta. Cir. 192.
Free from Experiment Station, Geneva, N. Y.
18. DDT to Control Pecan Weevil. Multigraphed, 1948. Available
free from Division of Horticulture, Tenn. Dept. of Agriculture,
Nashville 3, Tenn.
19. Blake, M. A. and Edgerton, L. J. Experience with Blight
Resistant Chestnuts in New Jersey. Bul. 717 N. J. Agr. Exp. Sta.,
New Brunswick, N. J.
20. Yerkes, Guy E. Propagation of Trees and Shrubs. U.S.D.A.
Farmers' Bul. No. 1567, available from Supt. of Documents, U. S.
Gov't Printing Office, Washington 25, D. C., price 10c (coin).
21. Cox, John A., et al. Top Working Pecan Trees. Ext. Circ. 209.
Available free from Louisiana State University, University,
Louisiana.