Survey of hereditary blindness at the school for the blind at Worcester
By: [by] J. Op't Hof.
Series: Research series no. 49
Publisher: National Bureau of Educational and Social Research
Published: 1967
Place of publication: Pretoria
Language: eng
Number of pages: 40
Subjects: Blindness -- Genetic aspects.
Notes: Bibliography: p. 38-40.
At head of title: Department of Higher Education.