(1987). Tactile maps: A listing of maps in the National Library Service for the Blind and Physically Handicapped Collection.
Chicago-Zitierstil (17. Ausg.)Tactile Maps: A Listing of Maps in the National Library Service for the Blind and Physically Handicapped Collection. Washington, 1987.
MLA-Zitierstil (9. Ausg.)Tactile Maps: A Listing of Maps in the National Library Service for the Blind and Physically Handicapped Collection. 1987.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.