Also available as part of the 'Additions and amendments service to the National Fund for Research into Crippling Diseases' 'Equipment for the disabled (B67-10129), London: National Fund for Research into Crippling Diseases, 1967.
Reading aids: microfilm projectors; and, Reading aids: prismatic spectacles by Research Institute for Consumer Affairs. ISBN 0900931027. Published by National Fund for Research into Crippling Diseases in 1970. Publication and catalogue information, links to buy online and reader comments.