The Challenge to our cultural heritage : why preserve the past? : proceedings of a Conference on Cultural Preservation, Washington, D.C., 8-10 April, 1984 / edited by Yudhishthir Raj Isar ; co-sponsored by United Nations Educational, Scientific, and Cultural Organization (UNESCO) and the Smithsonian Institution in cooperation with the United States Committee of the International Council on Monuments and Sites (US/ICOMOS) and the National Trust for Historic Preservation.

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