Bentley, A.
(1966). Musical ability in childreni aiid its mleasurements. London: Harrap, and 33 r.p.m. record Measures of musical ability.
2.
Bentley, A.
(1968). "Monotones." A comparison with "normal" singers in terms of incidence and musical abilities. London: Novello.
3.
Boardman, E. L. (1964). "An investigation of the effect of pre-school training on the development of vocal accuracy in young children." Unpublished doctoral thesis, University of Illinois.
4.
Cleall, C.
(1969). Voice production in choral technique. Sevenoaks, Kent: Novello.
5.
Gordon, E.
(1971). The psychology of music teaching. Englewood Cliffs, New Jersey: Prentice-Hall.
6.
Hattwick, M. S.
and Williams, H. M. (1935). The measurement of musical development II. University of Iowa Studies. Studies in Child Welfare, 11, 2-2.
7.
Joyner, D. R.
(1969). The monotone problem. Journal of Research in Music Education, 17, 1-1.
8.
Joyner, D. R. (1971). "Pitch Discrimination and tonal memory and their association with singing and the larynx." Unpublished M.Ph. thesis, University of Reading.
9.
Mursell, J. L.
and Glenn, M. (1938). The psychology of school music teaching. New York: Silver Burdett.
10.
New Zealand Department of Education
(1970). Music: Suggestions for teaching mnusic in primary schools. Wellington: Shearer, Government Printer.
11.
Orff, C.
(1960). Music for children. (Adapted by Hall, D. and Walter, A.) Mainze, Germany: B. Schott's Sohne. (Associated Music Publishers, New York.)
12.
Petzold, R. G.
(1969). Auditory perception by children. Journal of Research in Music Education, 17, 1-1.
13.
Richards, M. H.
(1964). Threshold to Music. Palo Alto: Fearon.
14.
Sandor, F.
(1969). Musical education in Hungary. Budapest: Boosey & Hawkes and Corvina Press.
15.
Seashore, C. E.
, Lewis, D. and Saetveit, J. S. (1939). Manual of instructions and interpretations for the Seashore measures of musical talents. Camden, New Jersey: R.C.A. Victor, and 78 r.p.m. record.
16.
Sergeant, D.
(1969). Experimental investigation of absolute pitch. Journzal of Research in Music Education, 17, 1-1.
17.
Suzuki, S.
(1969). Nurtured by love. New York: Exposition Press.
18.
Vernon, P. E.
(1932). The apprehension and cognition of music. Proceedings of the Royal Music Association, 59, 1932-1933, 61-84. Cited by Bentley, 1968. "Monotones." A comparison with "normal" singers in ternms of incidence and musical abilities. London: Novello.
19.
Zwissler, R. N. (1971). "An investigation of the pitch discrimination skills of first grade children identified as accurate singers and those identified as inaccurate singers." Unpublished doctoral thesis, University of California.
