6th International Mobility Conference, Madrid, 9-12 September 1991, The Spanish National Organisation of the Blind (ONCE), 1993, 2 volumes (volume 1 371 pp; volume 2 368pp), ISBN 84 872 36 5. Available from ONCE, Prado 24, 28014 Madrid, Spain
Titel:
6th International Mobility Conference, Madrid, 9-12 September 1991, The Spanish National Organisation of the Blind (ONCE), 1993, 2 volumes (volume 1 371 pp; volume 2 368pp), ISBN 84 872 36 5. Available from ONCE, Prado 24, 28014 Madrid, Spain
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