Colour blindness and defective eyesight in officers and sailors of the mercantile marine
Subtitle: a criticism of the Board of Trade tests
By: by Thomas H. Bickerton.
Publisher: James Thin
Published: 1890
Place of publication: Edinburgh
Language: eng
Number of pages: 20
Subjects: Color blindness.; Vision disorders.; Eye -- Examination.; Merchant mariners.
Notes: Cover title.