DurrellDonald D. (1927). “The Effect of Reading Disability on the Stanford Revision of the Binet-Simon Test,” unpublished master's thesis, University of Iowa..
2.
DurrellDonald D. (1930). “Reading Disability in the Intermediate Grades,” unpublished doctoral dissertation, Harvard University.
3.
DurrellGlen R. (1974). “Homesteading in Colorado,” in The Colorado Magazine L1/2, pages 93–114.
4.
GetzLoya Durrell (1999) Personal communication to Jane Catterson and Lisa Durrell.
5.
OrtonSamuel T. (1937). Reading Writing and Spelling Problems in Children.New York: W.W. Norton Co.