The eyes of 20,000
Subtitle: summary and conclusions of a research project carried out by the Optical Information Council between June 1968 and April 1969.
Publisher: Hatton P.
Published: 1969
Place of publication: London
Language: eng
Number of pages: 31
Subjects: Eye -- Examination.; Optometry -- Statistics.; Mass Screening.; Vision Tests -- statistics.
Notes: Cover title.