TY  - BOOK
AU  - Hersh,Marion A.(Editors)
AU  - Johnson,Michael A.(Editors)
TI  - Assistive Technology for Visually Impaired and Blind People 
SN  - 9781846288661
AV  - T10.5 HER  
PY  - 2008///
CY  - London
PB  - Springer
KW  - People with visual disabilities
KW  - Orientation and mobility
KW  - Technological innovations
KW  - Means of communication
KW  - Blind, Apparatus for the
KW  - Communication devices for people with disabilities
N1  - Includes bibliographical references and index
UR  - https://books.google.com.pk/books?id=HIBPnRAhh-gC&printsec=frontcover&dq=Assistive+Technology+for+Visually+Impaired+and+Blind+People&hl=en&sa=X&ved=0ahUKEwjUoojG7IXMAhVC1hoKHbawBH8Q6AEIGTAA#v=onepage&q=Assistive%20Technology%20for%20Visually%20Impaired%20and%20Blind%20People&f=false
ER  -