Color blindness in its relation to railway employees and the public
By: by G. Sterling Ryerson.
Series: CIHM/ICMH Microfiche series = CIHM/ICMH collection de microfiches -- no. 12800; CIHM/ICMH microfiche series -- no. 12800
Publisher: J.E. Bryant
Published: 1889
Place of publication: Toronto
Language: eng
Format: Microform
Number of pages: 11
Subjects: Color blindness -- Canada; Railroads -- Canada -- Employees; Achromatopsie -- Canada; Chemins de fer, Travailleurs des -- Canada