Johnson, B. M. (1979). Building practice note: Accessible pedestrian systems for those with physical disabilities. Ottawa: National Research Council Canada.
Παραπομπή Chicago StyleJohnson, B. M. Building Practice Note: Accessible Pedestrian Systems for Those With Physical Disabilities. Ottawa: National Research Council Canada, 1979.
Παραπομπή MLAJohnson, B. M. Building Practice Note: Accessible Pedestrian Systems for Those With Physical Disabilities. Ottawa: National Research Council Canada, 1979.
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