FranksF. L.Measurement in science for blind students. Unpublished study, Louisville: American Printing House for the Blind, 1969.
2.
GibsonJ. J.Observations on active touch. Psychological Review, 1962, 69, 477–491.
3.
GibsonJ. J.The senses considered as perceptual systems. Boston: Houghton-Mifflin, 1966.
4.
MorrisJ. E.NolanC. Y.Minimum sizes for areal type tactual symbols. International Journal for the Education of the Blind, 1963, 13, 48–51.
5.
MorrisJ. E.NolanC. Y.Plastic and areal linear symbols for the blind. Unpublished report, American Printing House for the Blind, 1967.
6.
NolanC. Y.MorrisJ. E.Development and validation of the Roughness Discrimination Test. International Journal for the Education of the Blind. 1965, 15, 1–6.
7.
NolanC. Y.MorrisJ. E.Tactual symbols for the blind: Final report. Louisville, Ky.: American Printing House for the Blind, 1963. (OVR-RD-587).
8.
SchiffW.Raised line drawing research project: Final report. New York: Recording for the Blind, 1966.
9.
SchiffW.IsikowH.Stimulus redundancy in the tactile perception of histograms. International Journal for the Education of the Blind, 1966, 196, 1–11.
10.
SchiffW.KauferL.MosakS.Informative tactile stimuli in the perception of direction. Perceptual & Motor Skills, 1966, 23 (3), 1315–1335.
11.
WexlerA.Experimental science for the blind. London: Pergamun Press, 1963.
