Recommended aids for the partially sighted
By: [by] Louise L. Sloan.
Edition: Rev. 2d ed., including: A nontechnical explanation of basic optical principles [by] Louise L. Sloan and Stephen J. Ryan, Jr.
Publisher: National Society for the Prevention of Blindness
Published: 1971
Place of publication: New York
Language: eng
Number of pages: 64
Subjects: People with visual disabilities.; Blind, Apparatus for the.; Visual aids.
Notes: Includes bibliographies.