Pseudo-isochromatic plates for testing color perception.
Publisher: American Optical Company
Published: 1940
Place of publication: [Southbridge, Mass.]
Language: eng
Subjects: Color blindness.
Notes: Bibliography: p. 11 of text.
Cover title.
Issued in bound folder form, the text (directions, 11 p.) in pocket mounted on front cover, the plates mounted on both sides of strip 192 x 23 cm., folded to 13 leaves, attached to back cover.