AO H-R-R pseudoisochromatic plates
By: by LeGrand H. Hardy, Gertrude Rand, M. Catherine Rittler.
Contributors: Rand, Gertrude, 1886-; Rittler, M. Catherine.; American Optical Company.
Edition: 2nd ed.
Publisher: American Optical Co.
Published: 1957
Place of publication: [Buffalo, N.Y.]
Language: eng
Number of pages: 56
Subjects: Color Perception Tests.
Other titles: Pseudoisochromatic plates.
Notes: "Approved by Subcommittee on Color Blindness Studies, Inter-Society Color Council."

"Based on the research work originally conducted in the Knapp Memorial Laboratory of Physiological Optics, the Institute of Ophthalmology of Presbyterian Hospital and the Department of Ophtholmology of the College of Physicians and Surgeons of Columbia University, New York, New York."