Specification for book holders, magnifiers and prismatic spectacles for use as reading aids in hospitals and the home
By: British Standards Institution.
Series: BS5043. 1973
Publisher: B.S.I.
Published: 1973
Place of publication: London
Language: eng
Subjects: Reading -- Aids and devices.; Prisms (Ophthalmology); Eyeglasses.; Reading -- Aids and devices.; Lenses.; Reading -- Aids and devices.
Notes: Pierced for binder.