Colour vision tests
By: by Professor Oscar Oblath ...
Series: International Labor Office, Geneva.  Studies and reports, series F, Industrial hygiene, no. 12
Published: 1929
Place of publication: Geneva
Language: eng
Number of pages: 47
Subjects: Color blindness.; Color vision.
Notes: At head of title: International labour office ...

Translated by dr. Marshall, M.B., CH. B.

Bibliography: 1 p. at end.