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2.
FelixL. and Spungin, S. Preschool Services for the Visually Handicapped: A National Survey.Journal of Visual Impairment and Blindness, 1978, 72(2) 59–66.
3.
HatfieldE.Why Are They Blind?The Sight-Saving Review, 197545 (1), 3–22.
4.
KahnH.A., & MoorheadH.B.Statistics on blindness in the model reporting area. 1969-70. DHEW Pub. No. 73-427. Washington, D.C.: Government Printing Office, 1973.
5.
KirchnerC., & LowmanC.Sources of variation in the estimated prevalence of visual loss.Journal of Visual Impairment and Blindness, 1978, 72(8) 329–333.
6.
KirchnerC., & PetersonR.Employment: Selected Characteristics.Journal of Visual Impairment and Blindness, 1979, 73(6) 239–42.
7.
NolanC.Y.Blind Children: Degree of Vision, Mode of Reading—A 1963 Replication.New Outlook for the Blind, 1965, 59, 233–38.
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NolanC.Y.A 1966 Reappraisal of the Relationship Between Visual Acuity and Mode of Reading for Blind Children.New Outlook for the Blind, 1967, 61, 255–261.
9.
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Statistical Brief #2 (see Peterson, Lowman & Kirchner, above).
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Statistical Brief #5 (see Kirchner & Peterson, above).
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