Preservation and rehabilitation of historic districts, towns and monuments : proceedings and final report of the United Nations Centre for Human Settlements (Habitat) and International Academy of Architecture International Seminar on the Preservation and Rehabilitation of Historic Districts, Towns and Monuments in Some Developed Countries and their Relevance to Developing Countries : 1-15 November 1989, IAA Santo Kiriko Creativity Centre, Assenovgrad, Bulgaria.
International Seminar on Preservation and Rehabilitation of Historic Districts, Towns and Monuments(1989 :Assenovgard, Bulgaria)
United Nations Centre for Human Settlements.
International Academy of Architecture.
Nairobi : United Nations Centre for Human Settlements (Habitat),
1990
Historic buildings
Historic districts