Anderson, T. (1937). Variations in the Normal Range of Children's Voices; Variations in Range of Tone Audition, Variations in Pitch Discrimination. Ph.D. thesis, Edinburgh.
2.
Bruner, J.
(1967). Toward a Thteory of Instruction. OUP.
3.
Cleall, C.
(1970). Voice Produiction in Choral Technique. London: Novello.
4.
Cobes, C. J.
(1972). The conditioning of a pitch response using uncertain singers. Bull. Council Res. Mus. Ed., No. 30, 28-29.
5.
Coffman, W. S. (1968). A Study of the Incidence and Characteristics of Boys' Voice Change in Grades 4, 5 and 6 in Schools of Leon County, Florida, and Inplications for School of Music Materials Deriving Therefrom. Ph.D. thesis, Florida State Univ.
6.
Froschels, E.
(1920). Untersuchungen iuber die Kinderstimme. Zentralb.f. Physiol., p. 34-34. 477-484, in Schoen (1940). Psychology of Music. New York: Roland Press.
7.
Gould, A. Oren
(1969). Developing specialised programs for singing in the elementary school. Bull. Council Res. Mus. Ed., No. 17, 9-22.
8.
Greene, M. C. L.
(1972). The Voice and its Disorders. London: Pitman.
9.
Gutzmann, H. (1928). Physiologie der Stimme und Sprache, Braunschweig. In Fieldhouse, A. E. (1937). A Study of Backwardness in Singing Among School-children. Ph.D. thesis, London Univ.
10.
Hall, K. J.
(1972). An Investigation of the Vocal Range of Junior Schoolchildren. Dip. Diss. Froebel Institute, London.
11.
Hattwick, M. S.
(1933). The role of pitch level and pitch range in the singing of pre-school, first grade, and second grade children. Child Develop., 4, 281-291.
12.
Hebb, D. O.
(1966). A Textbook of Psychology. London: Saunders.
13.
Jersild, A. T.
and Bienstock, S. F. (1934). A study of the development of children's ability to sing. J. Educ. Psychol., 25, 481-503.
14.
Jones, M.
(1971). A pilot study in the use of a vertically-arranged keyboard instrument with the uncertain singer. J.R.M.E., 19, 183-194.
15.
Joyner, D. R.
(1969). The monotone problem. J.R.M.E., 17, 115-124.
16.
Joyner, D. R. (1971). Pitch Discrimination and Tonal Memory and their Association with Singing and the Larynx. M.Phil. thesis, Reading.
17.
Kirkpatrick, W. C.
(1962). The relationship between the singing ability of prekindergarten children and their home environment. Diss. Abs., 23 (3), 886-886.
18.
McNaught, W. G.
(1890). Letter to the Editor. Mus. Times, March 1890.
19.
Paulsen, E.
(1895), See Revesz (1953). Introduction to the Psychology of Music. London: Longmans, p. 50-50.
20.
Plumridge, J. M. (1972). The Range and Pitch Levels of Children's Voices, in Relation to published Material for Children's Voices. Diss. Dip. Adv. Study of Ed., Reading.
21.
Roberts, E. (1972). Poor Pitch Singing. A Survey of its incidence in schoolchildren and its Response to Remedial Training. M.A. Diss., Liverpool.
22.
Roberts, E.
and Davies, A. (1975). Poor pitch singing: response of monotone singers to a program of remedial training. J.R.M.E., 23, 227-239.
23.
Thurloway, L.
(1977). An Investigation into Children's Ability to Sing Through the Study of Playground Songs. Dip. Diss. Froebel Institute, London.
24.
Wang, C.
, Marple, H. and Carlson, R. (1975). Increased difficulty of pitch identification and electroencephalographic desynchronisation. J.R.M.E., 23, 197-202.
25.
Warren Joseph
(1966). Vocal growth in the human adolescent and the total growth process. J.R.M.E., 14, 135-141.
26.
Wilson, D. S.
(1973). A study of the child voice from six to twelve. Bull. Council Res. Mus. Ed., No. 34, 54-60.
27.
Yank Porter, S.
(1977). The effect of multiple discrimination training on pitch-matching behaviour of uncertain singers. J.R.M.E., 25, 68-81.