World braille usage.
World braille usage.
- Paris : Washington : UNESCO, Library of Congress, 1990.
- 124 p.; 28 cm. il.
0844406767 (Library of Congress) 92-3102323-3
003.24 (100) =20 "1990" WOR.
0844406767 (Library of Congress) 92-3102323-3
003.24 (100) =20 "1990" WOR.