1. Color-vision and color-blindness: a practical manual for railroad surgeons Author(s): Jennings, J. Ellis (John Ellis), 1864-1906, author Publication: Philadelphia : The F.A. Davis Company, 1896 Subject(s): Color VisionColor Vision DefectsVision TestsRailroads
2. Color-blindness and defective sight among railroad employés Publication: [Boston?] : [publisher not identified], [1880?] Subject(s): Color Vision DefectsAccidents, Occupational -- prevention & controlVision TestsRailroads
