A Double X-Y platform for randsight-type instruments
Subtitle: prepared for the Department of Health, Education, and Welfare
By:  S. M. Genensky ... [et al.].
Contributors: Genensky, S. M.; United States. Dept. of Health, Education, and Welfare.
Series: [Report] - Rand Corporation ; R-1614-HEW
Publisher: Rand
Published: 1974
Place of publication: Santa Monica, CA
Language: eng
Number of pages: 43
Subjects: Blind, Apparatus for the.
Notes: Includes bibliographical references.