RT Journal Article SR Electronic(1) A1 Frascara, Jorge A1 Takach, Bonnie Sadler YR 1993 T1 The design of tactile map symbols for visually impaired people JF Information Design Journal VO 7 IS 1 SP 67 OP 75 DO https://doi.org/10.1075/idj.7.1.06fra PB John Benjamins SN 0142-5471, AB , UL https://www.jbe-platform.com/content/journals/10.1075/idj.7.1.06fra