Bibliographic Title:Opt Hof, J. (1967) Hereditary blindness family pedigrees = Oorerflike blindheid familiestambome. Pretoria: Human Sciences Research Council. http://hdl.handle.net/20.500.11910/17894 http://hdl.handle.net/20.500.11910/17894 Output Type:Monograph (Book) Read more
Bibliographic Title:Opt Hof, J. (1967) Survey of hereditary blindness at the school for the blind at Worcester. Pretoria: Human Sciences Research Council. http://hdl.handle.net/20.500.11910/17088 http://hdl.handle.net/20.500.11910/17088 Output Type:Monograph (Book) Read more