1. D.D. Rypkema, 'Rethinking economic values', in A.J. Lee (ed.) Past meets future: saving America's historic environments, National Trust for Historic Preservation, Washington, DC: Preservation Press, 1992.
2. P. Larkham, Conservation and the city, London: Routledge, 1996, p. 10.
3. English Heritage, 'Historic environment review', Discussion paper, 2000, p. 29.
4. Ibid.
5. J.M. Fitch, Historic preservation: curatorial management of the built world, Charlottesville/London: University Press of Virginia, 1995, p. 33.